Changes in woody plant composition of three vegetation types
... The effect of regular burning of woodland vegetation in Africa over an extended period (46 years) was studied in the Murchison Falls National Park, Uganda. Areas identified as having different vegetation types in 1958 were revisited to analyze vegetation changes and to test the prediction that conve ...
... The effect of regular burning of woodland vegetation in Africa over an extended period (46 years) was studied in the Murchison Falls National Park, Uganda. Areas identified as having different vegetation types in 1958 were revisited to analyze vegetation changes and to test the prediction that conve ...
Extinction thresholds: insights from simple models
... c is the threshold population size below which F(n) < 0. In the absence of the Allee effect, F(n) is always positive, as shown in Fig. 1. For this situation there is a single solution, n* = k, which is stable. On the other hand, Eq. 1 has two solutions, n* = k which is again stable, and n* = c, whic ...
... c is the threshold population size below which F(n) < 0. In the absence of the Allee effect, F(n) is always positive, as shown in Fig. 1. For this situation there is a single solution, n* = k, which is stable. On the other hand, Eq. 1 has two solutions, n* = k which is again stable, and n* = c, whic ...
Phenotypic and phylogenetic evidence for the role of food and
... tube-building ability). Higher values of K or k (up to a limit of 1 for k) indicate greater correspondence between trait distances and phylogenetic distances, and P values ,0.05 indicate that the correspondence between trait and phylogeny is nonrandom. Uncertainty in the phylogeny did not affect the ...
... tube-building ability). Higher values of K or k (up to a limit of 1 for k) indicate greater correspondence between trait distances and phylogenetic distances, and P values ,0.05 indicate that the correspondence between trait and phylogeny is nonrandom. Uncertainty in the phylogeny did not affect the ...
Review of the Impact of Invasive Alien Species on Species under
... Aware that invasive alien species (IAS) have an impact on migratory species through predation, competition and genetic changes caused by hybridization, as well as through the transmission of diseases, impairment of breeding and by causing loss of habitat and resources crucial for migratory species; ...
... Aware that invasive alien species (IAS) have an impact on migratory species through predation, competition and genetic changes caused by hybridization, as well as through the transmission of diseases, impairment of breeding and by causing loss of habitat and resources crucial for migratory species; ...
The Editorial Committee of the Annual Review of Ecology, Evolution
... warming of lowland and highland forests in France, latitudinal range shifts were expected in the ...
... warming of lowland and highland forests in France, latitudinal range shifts were expected in the ...
A patch-dynamic framework for food web metacommunities
... links move from lower species indices to higher ones. Although empirically compiled food webs display numerous examples of cannibalism, mutual predation and looping, most such cases involve age-structured feeding interactions (e.g. feeding on juveniles by adults of the same or different species (Pol ...
... links move from lower species indices to higher ones. Although empirically compiled food webs display numerous examples of cannibalism, mutual predation and looping, most such cases involve age-structured feeding interactions (e.g. feeding on juveniles by adults of the same or different species (Pol ...
Vanni et al 2009 - units.miamioh.edu
... asymmetric, meaning that it affects some individuals much more than others. This could be because some individuals are inherently better competitors, or because some individuals arrive at a site (or are born) earlier than others and thus preempt resources. Superior or early-arriving individuals may ...
... asymmetric, meaning that it affects some individuals much more than others. This could be because some individuals are inherently better competitors, or because some individuals arrive at a site (or are born) earlier than others and thus preempt resources. Superior or early-arriving individuals may ...
Population characteristics
... specific requirements - Extremely good at what they do, but vulnerable to change • Generalists = species with broad niches that can use a wide array of habitats and resources - Able to live in many different places Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
... specific requirements - Extremely good at what they do, but vulnerable to change • Generalists = species with broad niches that can use a wide array of habitats and resources - Able to live in many different places Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings ...
Reproductive Isolation among Acropora Species
... morphological and genetic data suggest that A. prolifera is a hybrid of A. cervicornis and A. palmata (van Oppen et al. 2000, Vollmer and Palumbi 2002), and all 3 species are believed to be capable of interbreeding (reviewed in Willis et al. 2006). Although hybridization has received a great deal of ...
... morphological and genetic data suggest that A. prolifera is a hybrid of A. cervicornis and A. palmata (van Oppen et al. 2000, Vollmer and Palumbi 2002), and all 3 species are believed to be capable of interbreeding (reviewed in Willis et al. 2006). Although hybridization has received a great deal of ...
- University of Gloucestershire
... of the diet of deer mice (Peromyscus maniculatus) (Pearson et al. 2000). Since deer mice ...
... of the diet of deer mice (Peromyscus maniculatus) (Pearson et al. 2000). Since deer mice ...
pdf - Gunnar Brehm
... ambient temperature. The large subfamily Ennominae has previously been assumed to be a group that occurs mainly at low and medium elevations. However, no decline in diversity was found in the study area. The diversity of the other large subfamily, Larentiinae, even increased from the lowest elevatio ...
... ambient temperature. The large subfamily Ennominae has previously been assumed to be a group that occurs mainly at low and medium elevations. However, no decline in diversity was found in the study area. The diversity of the other large subfamily, Larentiinae, even increased from the lowest elevatio ...
Biodiversity Principles and Applications
... history of periodic fires. A good way to account for possible dynamic systems in management would be to "...preserve large areas so you can have a shifting mosaic of communities in different stages." The last two topics, regional and property issues, were perhaps the most difficult to address. For e ...
... history of periodic fires. A good way to account for possible dynamic systems in management would be to "...preserve large areas so you can have a shifting mosaic of communities in different stages." The last two topics, regional and property issues, were perhaps the most difficult to address. For e ...
Are the ecological impacts of alien species misrepresented? A
... make up 86% of the diet of deer mice (Peromyscus maniculatus) (Pearson et al. 2000). Since deer mice populations are often food-limited (Taitt 1981), it is perhaps not surprising that mouse populations have increased in habitats with high gall fly abundance (Pearson et al. 2000). Removal of alien sp ...
... make up 86% of the diet of deer mice (Peromyscus maniculatus) (Pearson et al. 2000). Since deer mice populations are often food-limited (Taitt 1981), it is perhaps not surprising that mouse populations have increased in habitats with high gall fly abundance (Pearson et al. 2000). Removal of alien sp ...
Comparison of ant communities (Hymenoptera: Formicidae) in
... (Table 3). Comparison of dominant species among different habitat types. Abundance was measured by the number of quadrats (frequency) in which individual of each species was sampled or observed for each habitat type (Table 1). Generally Formica candida was the dominant species in all habitats with ...
... (Table 3). Comparison of dominant species among different habitat types. Abundance was measured by the number of quadrats (frequency) in which individual of each species was sampled or observed for each habitat type (Table 1). Generally Formica candida was the dominant species in all habitats with ...
The graph below shows how a population changes over time. Based
... (D) Species diversity will increase because the species richness of the community will increase. Distractor Rationale: This answer suggests the student may understand that there is a positive correlation between species richness and species diversity, but does not understand that species richness wi ...
... (D) Species diversity will increase because the species richness of the community will increase. Distractor Rationale: This answer suggests the student may understand that there is a positive correlation between species richness and species diversity, but does not understand that species richness wi ...
Chapter 50: An Introduction to Ecology and the Biosphere
... 1) Define ecology. Identify the two feature so organisms studied by ecologists. 2) Describe the relationship between ecology and evolutionary biology. 3) Distinguish between abiotic and biotic components of the environment. 4) Distinguish among organismal ecology, population ecology, community ecolo ...
... 1) Define ecology. Identify the two feature so organisms studied by ecologists. 2) Describe the relationship between ecology and evolutionary biology. 3) Distinguish between abiotic and biotic components of the environment. 4) Distinguish among organismal ecology, population ecology, community ecolo ...
Dry Forest Wildlife Habitat Objective
... •Washington and Oregon – trends not significant and credibility measure was “very imprecise” – 3-5% per year change would not be detected Population declines and range reductions: •Central Oregon – comparison of density estimates between Dixon (1995) and Frenzel and Popper (1998) indicate a 20% dec ...
... •Washington and Oregon – trends not significant and credibility measure was “very imprecise” – 3-5% per year change would not be detected Population declines and range reductions: •Central Oregon – comparison of density estimates between Dixon (1995) and Frenzel and Popper (1998) indicate a 20% dec ...
Angert et al. 2009 PNAS
... low-density advantages, which we show here (SI Appendix). The decoupling of reproductive success between species that promotes species coexistence can be measured as the statistical interaction between species and time for per germinant fecundity. In this article, we present a general framework for ...
... low-density advantages, which we show here (SI Appendix). The decoupling of reproductive success between species that promotes species coexistence can be measured as the statistical interaction between species and time for per germinant fecundity. In this article, we present a general framework for ...
larval protective coloration in swallowtails from the florida keys
... have saddle patches, are bird-dropping mimics. The mature caterpillars of these species range in length up to 4.5 and 5.5cm, respectively, and are simply too large. It is more likely that this pattern of light and dark areas on large larvae is disruptive in nature. In many species of Papilio, there ...
... have saddle patches, are bird-dropping mimics. The mature caterpillars of these species range in length up to 4.5 and 5.5cm, respectively, and are simply too large. It is more likely that this pattern of light and dark areas on large larvae is disruptive in nature. In many species of Papilio, there ...
Ecological Impacts of Alien Species
... the impacts of those species and, therefore, to provide timely advice to managers on where limited resources should be allocated. This capacity has been limited partly by the context-dependent nature of ecological impacts, research highly skewed toward certain taxa and habitat types, and the lack of ...
... the impacts of those species and, therefore, to provide timely advice to managers on where limited resources should be allocated. This capacity has been limited partly by the context-dependent nature of ecological impacts, research highly skewed toward certain taxa and habitat types, and the lack of ...
1 - Biology Department | UNC Chapel Hill
... species to coexist locally, i.e. mechanisms that are not due to imposed habitat heterogeneity within the Stabilising mechanisms ...
... species to coexist locally, i.e. mechanisms that are not due to imposed habitat heterogeneity within the Stabilising mechanisms ...
Species-rich ecosystems are vulnerable to cascading extinctions in an increasingly variable world
... where dN i /dt is the rate of change of density of species i with respect to time in a community with s species, bi (t) is the intrinsic per capita growth (mortality) rate of primary producer (consumer) species i at time t, and ãij is the per capita effect of species j on the per capita growth rate ...
... where dN i /dt is the rate of change of density of species i with respect to time in a community with s species, bi (t) is the intrinsic per capita growth (mortality) rate of primary producer (consumer) species i at time t, and ãij is the per capita effect of species j on the per capita growth rate ...
Non-Indigenous Species
... of NIS in Maltese waters). A list of non‐indigenous taxonomic groups for the Mediterranean Sea, including less studied groups such as plankton, is provided by Streftaris, Zenetos & Papathanassiou (2005)31. ...
... of NIS in Maltese waters). A list of non‐indigenous taxonomic groups for the Mediterranean Sea, including less studied groups such as plankton, is provided by Streftaris, Zenetos & Papathanassiou (2005)31. ...
Estimating the tolerance of species to the effects
... change and mutualistic trade-offs can have a different impact on species’ tolerance. Contrary to the scenario of constant environmental conditions, where degree is the gold standard measure for estimating species’ tolerance, here we have demonstrated that in a changing environment this is not alway ...
... change and mutualistic trade-offs can have a different impact on species’ tolerance. Contrary to the scenario of constant environmental conditions, where degree is the gold standard measure for estimating species’ tolerance, here we have demonstrated that in a changing environment this is not alway ...