Trophic network models explain instability of Early Triassic terrestrial
... to major top-down propagations of secondary extinctions ( Vermeij 2004), though the effects of top-down trophic cascades can be demographically significant (Myers et al. 2007). Third, the increasing human exploitation of species at lower trophic levels, our expanding control of photosynthetic resour ...
... to major top-down propagations of secondary extinctions ( Vermeij 2004), though the effects of top-down trophic cascades can be demographically significant (Myers et al. 2007). Third, the increasing human exploitation of species at lower trophic levels, our expanding control of photosynthetic resour ...
- Wiley Online Library
... scales, this can result in the costly loss of access to resources. However, fine-scale reactors while maintaining access to resources, thereby providing a mechanism for coexistence. We investigated fine-scale spatiotemporal avoidance in a guild of African predators characterized by intense interfe ...
... scales, this can result in the costly loss of access to resources. However, fine-scale reactors while maintaining access to resources, thereby providing a mechanism for coexistence. We investigated fine-scale spatiotemporal avoidance in a guild of African predators characterized by intense interfe ...
Food web complexity and chaotic population dynamics
... logistically with growth rate ri (we parameterized: r1 ¼ r2 ¼ r3 ¼ 2.5 day–1) and carrying capacity Ki, which we set to unity. Therefore, all population sizes in our models are relative to the primary producers’ carrying capacity. We assumed no density dependence for heterotrophic species. Predation ...
... logistically with growth rate ri (we parameterized: r1 ¼ r2 ¼ r3 ¼ 2.5 day–1) and carrying capacity Ki, which we set to unity. Therefore, all population sizes in our models are relative to the primary producers’ carrying capacity. We assumed no density dependence for heterotrophic species. Predation ...
Hamster, Cricetus cricetus - European Commission
... Hamsters are very territorial and one burrow is used by one individual only (except for when the mother has young); Males occupy a larger territory (0,5-2ha) than females (0,1-0,6ha). The male is polygamous and will have several females within its territory; Main period of reproduction is from early ...
... Hamsters are very territorial and one burrow is used by one individual only (except for when the mother has young); Males occupy a larger territory (0,5-2ha) than females (0,1-0,6ha). The male is polygamous and will have several females within its territory; Main period of reproduction is from early ...
Mechanical vulnerability explains sizedependent mortality of reef
... Modularity allows organisms to escape allometric constraints that limit the size of individual modules (Jackson 1979), and consequently an organism’s demographic contributions should be dependent on the number of modules (Hall & Hughes 1996). Modularity also introduces several life history possibili ...
... Modularity allows organisms to escape allometric constraints that limit the size of individual modules (Jackson 1979), and consequently an organism’s demographic contributions should be dependent on the number of modules (Hall & Hughes 1996). Modularity also introduces several life history possibili ...
Part 2 - Management Plan Rev S - clean version
... where species may have been recorded but where there is insufficient information to assess the area as essential/core habitat. ‘General habitat’ also includes areas defined from known records or habitat that is considered to potentially support a species according to expert knowledge of habitat rela ...
... where species may have been recorded but where there is insufficient information to assess the area as essential/core habitat. ‘General habitat’ also includes areas defined from known records or habitat that is considered to potentially support a species according to expert knowledge of habitat rela ...
Report_Civet Cat
... Worldwide: This species has been found in a wide range of habitats including evergreen and deciduous forest (primary and secondary), plantations and near humans, in habitats up to 2,400 m (Ratnam et al., 1995; Heydon and Bulloh, 1996; Duckworth 1997; Azlan, 2003; Heaney et al. 2004; Su Su, 2005; Wel ...
... Worldwide: This species has been found in a wide range of habitats including evergreen and deciduous forest (primary and secondary), plantations and near humans, in habitats up to 2,400 m (Ratnam et al., 1995; Heydon and Bulloh, 1996; Duckworth 1997; Azlan, 2003; Heaney et al. 2004; Su Su, 2005; Wel ...
Ecological fidelity of functional traits based on species presence
... AMBTotal (and assess specific biasing factors, such as body size), we used similarity metrics, multivariate ordination (i.e., nonmetric multidimensional scaling), and logistic models (Gotelli and Ellison 2004; Kidwell 2007; Terry 2010a; Miller 2011; Legendre and Legendre 2012; Sokal and Rohlf 2012). ...
... AMBTotal (and assess specific biasing factors, such as body size), we used similarity metrics, multivariate ordination (i.e., nonmetric multidimensional scaling), and logistic models (Gotelli and Ellison 2004; Kidwell 2007; Terry 2010a; Miller 2011; Legendre and Legendre 2012; Sokal and Rohlf 2012). ...
Teredo navalis, Common shipworm - GB non
... We try to keep these factsheets up to date, however if you notice any issues please contact us ...
... We try to keep these factsheets up to date, however if you notice any issues please contact us ...
Instructor: Dr. Rudy Boonstra Office:
... Course Homepage: Available through UTSC homepage, upper right: Blackboard Portal. All communication will be done via this mechanism. Check it weekly and more often near due dates for assignments. Lecture slides, data files, essay writing tools, news items, etc. will be posted. Announcements: It is Y ...
... Course Homepage: Available through UTSC homepage, upper right: Blackboard Portal. All communication will be done via this mechanism. Check it weekly and more often near due dates for assignments. Lecture slides, data files, essay writing tools, news items, etc. will be posted. Announcements: It is Y ...
Impacts of climate change on the future of biodiversity
... allow species to adapt to the new climatic conditions in the same spatial and temporal frame. Spatial. First, species can track appropriate conditions in space and follow them. This is typically done through dispersion, but spatial changes are not limited to this: shifts to a different habitat at th ...
... allow species to adapt to the new climatic conditions in the same spatial and temporal frame. Spatial. First, species can track appropriate conditions in space and follow them. This is typically done through dispersion, but spatial changes are not limited to this: shifts to a different habitat at th ...
Predator–prey size relationships in an African large
... species, to counterbalance their allometrically scaled maximum recruitment rate (White et al. 2007). Accordingly, a similar increase in annual adult mortality should have a greater effect on the population dynamics of larger prey species. Few previous assessments of food web structure and dynamics h ...
... species, to counterbalance their allometrically scaled maximum recruitment rate (White et al. 2007). Accordingly, a similar increase in annual adult mortality should have a greater effect on the population dynamics of larger prey species. Few previous assessments of food web structure and dynamics h ...
Parasites, diversity and the ecosystem.
... parasitism at the ecosystem level. Probably the central question is to ask, how do parasites influence ecosystem functioning? Or more specifically, what are the consequences of parasite removal for the community and energy flow in the ecosystem? What is the biomass of parasites within the ecosystem ...
... parasitism at the ecosystem level. Probably the central question is to ask, how do parasites influence ecosystem functioning? Or more specifically, what are the consequences of parasite removal for the community and energy flow in the ecosystem? What is the biomass of parasites within the ecosystem ...
on the relationship between regional and local species richness
... leading to disparate local communities through time, due to better competitors or colonists being present in one regional pool and not another. Composition may thus have important implications for the relationship between local and regional richness, especially if, as recently suggested, community a ...
... leading to disparate local communities through time, due to better competitors or colonists being present in one regional pool and not another. Composition may thus have important implications for the relationship between local and regional richness, especially if, as recently suggested, community a ...
Power Point Presentation - Hale AP Biology
... • Character displacement is a tendency for characteristics to be more divergent in sympatric populations of two species than in allopatric populations of the same two species • An example is variation in beak size between populations of two species of Galápagos ...
... • Character displacement is a tendency for characteristics to be more divergent in sympatric populations of two species than in allopatric populations of the same two species • An example is variation in beak size between populations of two species of Galápagos ...
Food-web structure and ecosystem services: insights from the
... The central organizing theme of this paper is to discuss the dynamics of the Serengeti grassland ecosystem from the perspective of recent developments in food-web theory. The seasonal rainfall patterns that characterize the East African climate create an annually oscillating, large-scale, spatial mo ...
... The central organizing theme of this paper is to discuss the dynamics of the Serengeti grassland ecosystem from the perspective of recent developments in food-web theory. The seasonal rainfall patterns that characterize the East African climate create an annually oscillating, large-scale, spatial mo ...
Caretta caretta (North West Indian Ocean
... For marine turtles, annual counts of nesting females and their nesting activities (more often the latter) are the most frequently recorded and reported abundance metric across index monitoring sites, species, and geographic regions (National Research Council 2010). To apply criterion A, three genera ...
... For marine turtles, annual counts of nesting females and their nesting activities (more often the latter) are the most frequently recorded and reported abundance metric across index monitoring sites, species, and geographic regions (National Research Council 2010). To apply criterion A, three genera ...
Conservation Systematics: The Bufo boreas Species Group
... diversity, including organismic, ecological, climatic, and landscape diversity (Moss, 2000). However, the purpose of systematics and taxonomy is to describe organismic diversity, which will remain the focus of this essay. Because organismic diversity is a broad term, let me define my use in this ess ...
... diversity, including organismic, ecological, climatic, and landscape diversity (Moss, 2000). However, the purpose of systematics and taxonomy is to describe organismic diversity, which will remain the focus of this essay. Because organismic diversity is a broad term, let me define my use in this ess ...
DEFYING EXTINCTION - Global Environment Facility
... need to support the expansion of threatened species coverage in protected area systems. Given that more than 70 percent of all species owe their threatened status to the loss of habitat, this directive can help to fill important gaps in protected areas at the national level. Some pilot investments ...
... need to support the expansion of threatened species coverage in protected area systems. Given that more than 70 percent of all species owe their threatened status to the loss of habitat, this directive can help to fill important gaps in protected areas at the national level. Some pilot investments ...
Panthera pardus ssp. saxicolor, Persian Leopard
... very low (Farhadinia et al. 2007) – 0.06-0.1 individual/100 km² based on guesstimates in Kiabi et al. (2002). The status of the leopard in Afghanistan is poorly known. Habibi (2004) described it as threatened, noting that it is only rarely encountered in the more remote parts of its montane range, d ...
... very low (Farhadinia et al. 2007) – 0.06-0.1 individual/100 km² based on guesstimates in Kiabi et al. (2002). The status of the leopard in Afghanistan is poorly known. Habibi (2004) described it as threatened, noting that it is only rarely encountered in the more remote parts of its montane range, d ...
Interactions between sea urchin grazing and prey diversity on
... grouping species richness and urchins into separate bins by amount, and then using these binned values to assign urchins to plots in a manner that created all possible combinations of urchin density and prey richness (see Appendix A for full design). Specifically, we grouped 15 levels of urchin densi ...
... grouping species richness and urchins into separate bins by amount, and then using these binned values to assign urchins to plots in a manner that created all possible combinations of urchin density and prey richness (see Appendix A for full design). Specifically, we grouped 15 levels of urchin densi ...
table - cabi-isc
... DATASHEET FOR CABI INVASIVE SPECIES COMPENDIUM INVASIVE PLANT SPECIES – EXAMPLE This form should be completed electronically, but please save the text sections followed by all references (for text and tables) in a separate file. A checklist of the text sections and suggested subheadings is repeated ...
... DATASHEET FOR CABI INVASIVE SPECIES COMPENDIUM INVASIVE PLANT SPECIES – EXAMPLE This form should be completed electronically, but please save the text sections followed by all references (for text and tables) in a separate file. A checklist of the text sections and suggested subheadings is repeated ...
Interaction strengths in food webs - Centre for Biodiversity Theory
... interactions is often a debate about what questions are more interesting. Often, however, one approach cannot answer all questions, and each approach must be ...
... interactions is often a debate about what questions are more interesting. Often, however, one approach cannot answer all questions, and each approach must be ...
Disentangling the importance of ecological niches from stochastic
... communities are not saturated with species [7,82–84]. Likewise, local diversity is typically higher in metacommunities where dispersal rates among localities are more frequent relative to those with less-frequent dispersal [83]. Moreover, the extent to which propagule arrival influences species rich ...
... communities are not saturated with species [7,82–84]. Likewise, local diversity is typically higher in metacommunities where dispersal rates among localities are more frequent relative to those with less-frequent dispersal [83]. Moreover, the extent to which propagule arrival influences species rich ...
Interaction strengths in food webs
... interactions is often a debate about what questions are more interesting. Often, however, one approach cannot answer all questions, and each approach must be ...
... interactions is often a debate about what questions are more interesting. Often, however, one approach cannot answer all questions, and each approach must be ...