What is going on with the silver Y, Autographa gamma?
... the year, data on the entire Lepidoptera fauna were analysed. For each day the average number of species was calculated that was yielded by a collection event. These values for 2014 were compared to the corresponding values over the last 30 years. The daily difference in species-yield is cumulativel ...
... the year, data on the entire Lepidoptera fauna were analysed. For each day the average number of species was calculated that was yielded by a collection event. These values for 2014 were compared to the corresponding values over the last 30 years. The daily difference in species-yield is cumulativel ...
Social and landscape effects on food webs: a
... different migration abilities cause species sorting and, thus, generate differences between local pitcher plant communities [9]. A systematic study on beetle metacommunities has shown that low dispersal rates are associated with more stable local communities [10]. Changes at landscape level can have ...
... different migration abilities cause species sorting and, thus, generate differences between local pitcher plant communities [9]. A systematic study on beetle metacommunities has shown that low dispersal rates are associated with more stable local communities [10]. Changes at landscape level can have ...
Delayed, chronic, and indirect effects of shoreline
... Problems with field-based empirical assessment approach • Expensive to conduct – who should pay? • Study design begets conclusions – who should design the study? • Typically lack before data – but rigorous study designs are still possible • Time-consuming to capture indirect, chronic, and delayed e ...
... Problems with field-based empirical assessment approach • Expensive to conduct – who should pay? • Study design begets conclusions – who should design the study? • Typically lack before data – but rigorous study designs are still possible • Time-consuming to capture indirect, chronic, and delayed e ...
Ecosystem-level consequences of invasions by native species as a
... while changes in relative abundance among species (i.e., evenness) are more frequent than extinction of species and are able to cause important changes in ecosystem function, most studies have curiously not examined thoroughly the potential role of that diversity component. The few small-scale exper ...
... while changes in relative abundance among species (i.e., evenness) are more frequent than extinction of species and are able to cause important changes in ecosystem function, most studies have curiously not examined thoroughly the potential role of that diversity component. The few small-scale exper ...
Short-term impacts of logging on understorey vegetation in a jarrah
... treatments and not to other factors such as site variation. The null hypothesis under test was that there is no significant difference in terms of a) plant species richness and b) abundance, between the silvicultural treatments and the controls (adjacent coupe buffers and external controls). The two ...
... treatments and not to other factors such as site variation. The null hypothesis under test was that there is no significant difference in terms of a) plant species richness and b) abundance, between the silvicultural treatments and the controls (adjacent coupe buffers and external controls). The two ...
Name of indicator 3.10 Zooplankton mean size vs. total stock (MSTS)
... The indicator is based on the idea that the mean size of zooplankton and the biomass or abundance, when examined together, provide more information than when the parameters are considered separately. Abundant zooplankton with a high mean size would indicate good feeding conditions for zooplanktivoro ...
... The indicator is based on the idea that the mean size of zooplankton and the biomass or abundance, when examined together, provide more information than when the parameters are considered separately. Abundant zooplankton with a high mean size would indicate good feeding conditions for zooplanktivoro ...
Amphibian Survival Alliance (ASA)
... Conference on illegal killing of birds" (Larnaca, Cyprus), delivering the so-called “Larnaca Declaration” to promote a “Zero tolerance approach toward illegal killing of birds” - as well as Recommendation No. 155 (2011) on the illegal killing, trapping and trade of wild birds. In order to move forwa ...
... Conference on illegal killing of birds" (Larnaca, Cyprus), delivering the so-called “Larnaca Declaration” to promote a “Zero tolerance approach toward illegal killing of birds” - as well as Recommendation No. 155 (2011) on the illegal killing, trapping and trade of wild birds. In order to move forwa ...
Direct and indirect bottom-up and top-down forces shape the
... of 50 cm on each side, ignoring those webs built directly along the central 30 cm wide path. For each plot, the presence/absence and the abundance of A. bruennichi (measured as the number of occupied webs) was recorded. The identity of support plants (only in 2009) as well as the number and identity ...
... of 50 cm on each side, ignoring those webs built directly along the central 30 cm wide path. For each plot, the presence/absence and the abundance of A. bruennichi (measured as the number of occupied webs) was recorded. The identity of support plants (only in 2009) as well as the number and identity ...
Amphibian Survival Alliance (ASA)
... Conference on illegal killing of birds" (Larnaca, Cyprus), delivering the so-called “Larnaca Declaration” to promote a “Zero tolerance approach toward illegal killing of birds” - as well as Recommendation No. 155 (2011) on the illegal killing, trapping and trade of wild birds. In order to move forwa ...
... Conference on illegal killing of birds" (Larnaca, Cyprus), delivering the so-called “Larnaca Declaration” to promote a “Zero tolerance approach toward illegal killing of birds” - as well as Recommendation No. 155 (2011) on the illegal killing, trapping and trade of wild birds. In order to move forwa ...
Chapter 12 Communities and Populations Worksheets
... Exponential and Logistic Growth. Curve A shows exponential growth. Curve B shows logistic growth. (Image courtesy of CK-12 Foundation and under the Creative Commons license CC-BY-NC-SA 3.0.) Logistic Growth Most populations do not live under ideal conditions. Therefore, most do not grow exponentiall ...
... Exponential and Logistic Growth. Curve A shows exponential growth. Curve B shows logistic growth. (Image courtesy of CK-12 Foundation and under the Creative Commons license CC-BY-NC-SA 3.0.) Logistic Growth Most populations do not live under ideal conditions. Therefore, most do not grow exponentiall ...
Chapter 25: Community Ecology
... Some of the best evidence for the existence of competition comes from experimental field studies. By setting up experiments in which two species either occur alone or together, scientists can determine whether the presence of one species has a negative effect on a population of a second species. For ...
... Some of the best evidence for the existence of competition comes from experimental field studies. By setting up experiments in which two species either occur alone or together, scientists can determine whether the presence of one species has a negative effect on a population of a second species. For ...
Genetic diversity
... and ancient site • A low value of “D” could suggest pollution, recent colonization, or agricultural management • Index normally used in studies of vegetation but can be applied to comparisons of diversity of any species ...
... and ancient site • A low value of “D” could suggest pollution, recent colonization, or agricultural management • Index normally used in studies of vegetation but can be applied to comparisons of diversity of any species ...
Effects of the non-native amphibian species Discoglossus pictus on
... original data to create pseudo-communities, using EcoSim v7.72 (Gotelli and Entsminger 2007). We applied the randomization algorithm RA2 (Lawlor 1980) to the data, with niche breadth relaxed but with the zero structure of the matrix retained (Gotelli and Entsminger 2007). This algorithm is more real ...
... original data to create pseudo-communities, using EcoSim v7.72 (Gotelli and Entsminger 2007). We applied the randomization algorithm RA2 (Lawlor 1980) to the data, with niche breadth relaxed but with the zero structure of the matrix retained (Gotelli and Entsminger 2007). This algorithm is more real ...
Species at Risk, Conservation Strategies, and Ecological Integrity
... which will obviously include saving our species at risk. However, we also want to save other species and develop a functional conservation network. Further, since some habitats have already been set aside in protected areas, these should be incorporated into the network, where possible, and added to ...
... which will obviously include saving our species at risk. However, we also want to save other species and develop a functional conservation network. Further, since some habitats have already been set aside in protected areas, these should be incorporated into the network, where possible, and added to ...
Cadotte2007 Ecology
... potential explanation for the coexistence of species and the maintenance of patterns of species diversity (Levin and Paine 1974, Slatkin 1974, Petraitis et al. 1989, Tilman 1990, Chesson and Huntly 1997, Shea et al. 2004) often because disturbance resets local successional trajectories preventing ea ...
... potential explanation for the coexistence of species and the maintenance of patterns of species diversity (Levin and Paine 1974, Slatkin 1974, Petraitis et al. 1989, Tilman 1990, Chesson and Huntly 1997, Shea et al. 2004) often because disturbance resets local successional trajectories preventing ea ...
Animal Behavior as a Tool in Conservation Biology
... predator avoidance and learned foraging skills, and briefly discuss how they might be manipulated to increase survival rate. Predator avoidance is key to survival for most species. For some vertebrates, effective predator avoidance is related to local habitat familiarity (Isbell et a ...
... predator avoidance and learned foraging skills, and briefly discuss how they might be manipulated to increase survival rate. Predator avoidance is key to survival for most species. For some vertebrates, effective predator avoidance is related to local habitat familiarity (Isbell et a ...
Illumination–size relationships of 109 coexisting
... The argument begins by noting, first, that to best persist in low light, plants must maximize photon capture and minimize carbon expended. Low photosynthetic capacity is beneficial because it is less costly, but this leaves the plant poorly equipped to utilize high illumination. In contrast, plants ...
... The argument begins by noting, first, that to best persist in low light, plants must maximize photon capture and minimize carbon expended. Low photosynthetic capacity is beneficial because it is less costly, but this leaves the plant poorly equipped to utilize high illumination. In contrast, plants ...
Comparative Population Ecology of Eleven Species
... certain species. Table 1 presents data for standing-stock population densities of each species averaged for all 14-20 plots to which it had access and for only the two unmanipulated control plots. Brown and Munger (1985) compared several life history parameters between experimentally manipulated and ...
... certain species. Table 1 presents data for standing-stock population densities of each species averaged for all 14-20 plots to which it had access and for only the two unmanipulated control plots. Brown and Munger (1985) compared several life history parameters between experimentally manipulated and ...
Interactions among Foundation Species and Their Consequences
... amelioration (Altieri et al. 2010). The regularity with which foundation-species distributions overlap suggests that emergent effects, such as facilitation cascades, may play a critical role in the organization and stabilization of many communities (Yakovis et al. 2008). Coexisting foundation specie ...
... amelioration (Altieri et al. 2010). The regularity with which foundation-species distributions overlap suggests that emergent effects, such as facilitation cascades, may play a critical role in the organization and stabilization of many communities (Yakovis et al. 2008). Coexisting foundation specie ...
Unit: BIODIVERSITY (Reading material exclusively for students of
... Since there are published records of all the species discovered and named, we know how many species in all have been recorded so far, but it is not easy to answer the question of how many species there are on earth. According to the IUCN (2004), the total number of plant and animal species describe ...
... Since there are published records of all the species discovered and named, we know how many species in all have been recorded so far, but it is not easy to answer the question of how many species there are on earth. According to the IUCN (2004), the total number of plant and animal species describe ...
Unit 2 Ecology Chp 52 Intro to Ecology and the
... Although many species are naturally restricted to particular biogeographic realms by their dispersal abilities, humans have managed to move species around the globe, particularly during the last 200 years. In fact, the most spectacular examples of dispersal affecting distribution occur when species ...
... Although many species are naturally restricted to particular biogeographic realms by their dispersal abilities, humans have managed to move species around the globe, particularly during the last 200 years. In fact, the most spectacular examples of dispersal affecting distribution occur when species ...
use intensity affects orthopteran communities
... we employed a new approach termed “niche model,” coupled with a randomization procedure, which is sensitive even for rare species for which trends may otherwise be difficult to detect. Based on abundance- weighted means for each species, we quantified the species’ occurrence along land-use gradien ...
... we employed a new approach termed “niche model,” coupled with a randomization procedure, which is sensitive even for rare species for which trends may otherwise be difficult to detect. Based on abundance- weighted means for each species, we quantified the species’ occurrence along land-use gradien ...
Biology and Conservation of the Santa Cruz long
... relaxed inward bound movement of reproductive males, then females arrive as rains begin to fill temporary ponds. ...
... relaxed inward bound movement of reproductive males, then females arrive as rains begin to fill temporary ponds. ...
call diversity and diel
... particularly the ants (Formicidae) (Stork 1991; Basset et al. 1992). Studies from the Bornean lowland rainforest have shown that orthopteran insects account for between 1 to 3% of the species in the canopy (Stork 1991). The order Orthoptera is divided into two major groups: the Caelifera (grasshoppe ...
... particularly the ants (Formicidae) (Stork 1991; Basset et al. 1992). Studies from the Bornean lowland rainforest have shown that orthopteran insects account for between 1 to 3% of the species in the canopy (Stork 1991). The order Orthoptera is divided into two major groups: the Caelifera (grasshoppe ...