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David Schneider
Permíteme presentarme: nací y crecí en una pequeña isla de Francia. Crecí en una familia amorosa que siempre apoyó mi interés por la ciencia y la naturaleza. Fui a la universidad en el "continente" y luego viví en varios países europeos durante un tiempo como estudiante de posgrado, para finalmente establecerme en Baja California como investigador postdoctoral.
Mi carrera de investigación comenzó con una sola planta llamada Salicornia, y luego mi interés por las interacciones despegó cuando comencé mi maestría con avispas parasitoides, pasando luego a un sistema tritrófico durante mi doctorado.
Actualmente, estoy explorando cómo la vegetación y los hábitats que rodean los viñedos de Baja California cambian la comunidad de artrópodos que vive dentro del cultivo.
Siempre me ha encantado la complejidad de las interacciones en los ecosistemas, ya sean nativos o agrícolas.
Hoy en día, tenemos herramientas poderosas para expandir nuestra comprensión de una red de vida tan compleja. Estoy muy convencido de que la combinación de nuevas tecnologías como el reconocimiento visual por máquina, el metabarcoding, el big data y el deep learning abrirá el camino hacia una ecología y agroecología verdaderamente integradoras.
Como ser humano, mi esperanza es obtener una comprensión profunda de los diferentes actores en los viñedos (insectos, plantas, suelo, etc.) y promover una cultura de uso de servicios ecosistémicos en la industria local, por encima de los métodos convencionales (prácticas mecánicas y químicas intensivas).
Por el bien de la vida silvestre de Baja California, la comunidad local y la salud de los trabajadores agrícolas, los márgenes de ganancia de los propietarios de los viñedos, así como la experiencia de los consumidores de vino.
Conoce mi perfil académico en researchgate.com
Artículos como primer autor
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Two Adaptations of Foray's Unified Energetic Budget
Measurement Protocol for Highly Chitinized Insects and
Faster Glycogen Determination
In this study, we address the limitations of existing protocols for energetic budget measurements in heavily chitinized insects. Two primary adaptations are proposed: the use of liquid nitrogen for sample processing and a simplified method for glycogen concentration determination. Liquid nitrogen allows for efficient handling of hard exoskeletons without affecting the accuracy of lipid, protein, and carbohydrate measurements. The glycogen measurement, traditionally conducted through low-protein binding membrane filtration, is streamlined using a centrifugation technique. These adaptations not only facilitate quicker and more efficient analysis but also extend the applicability of the protocol to a broader range of insect species, enhancing research capabilities in entomological studies.
Multigenerational experimental simulation of climate change on an economically important insect pest
Long-term multigenerational experimental simulations of climate change on insect pests of economically and socially important crops are crucial to anticipate challenges for feeding humanity in the not-so-far future. Mexican bean weevil Zabrotes subfas- ciatus, is a worldwide pest that attacks the common bean Phaseolus vulgaris seeds, in crops and storage. We designed a long term (i.e., over 10 generations), experimental simulation of climate change by increasing temperature and CO2 air concentration in controlled conditions according to model predictions for 2100. Higher temperature and CO2 concentrations favored pest's egg-to-adult development survival, even at high female fecundity. It also induced a reduction of fat storage and increase of pro- tein content but did not alter body size. After 10 generations of simulation, genetic adaptation was detected for total lipid content only, however, other traits showed signs of such process. Future experimental designs and methods similar to ours, are key for studying long-term effects of climate change through multigenerational ex- perimental designs.
Altitude, temperature, and parasitoid pressure may prevent competition between two Mexican bruchid beetles attacking wild Phaseolus vulgaris
Acanthoscelides obtectus (Say) and Acanthoscelides obvelatus (Bridwell) (Coleoptera: Bruchidae) are two sympatric beetle species that infest bean seeds (Phaseolus vulgaris L.; Fabaceae). Using field-sampled wild P. vulgaris pods and data of population density, body size, and parasitoid pressure for both species across elevation and temperature gradients in the Mexican Altiplano, we explored whether interspecific competition occurs between the two bruchids. We expected that population density, body size, and parasitoid pressure of A. obtectus and A. obvelatus to be inversely related to one another. We found that population densities of the two species differed among the elevations, but their body sizes were independent of expected density patterns. Moreover, the parasitoid emergence rate was correlated to A. obvelatus abundance but not A. obtectus abundance. Our data suggest that niches of A. obtectus and A. obvelatus overlap only to such extent that interspecific competition seems unlikely due to a) alternative hosts are available for A. obtectus, and b) P. vulgaris seeds and alternative legumes are a fairly common resource in the studied area.
Otros artículos en los que colaboré en la investigación y/o redacción o simplemente proporcioné material o muestras.
Ultraviolet polarized light and individual condition drive habitat selection in tropical damselflies and dragonflies
The potential of temporary shelters to increase survival of the endangered Mexican axolotl
Integrative taxonomy to assess the species richness of chalcidoid parasitoids (Hymenoptera) associated to Bruchinae (Coleoptera: Chrysomelidae) from Mexico
A New Species of Torymus (Hymenoptera: Torymidae) Associated with Two Genera of Bruchinae (Coleoptera: Chrysomelidae) in México
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