Apex Predators of Costa Rica - Point Loma Nazarene University
... The wolves of Yellowstone present a case study which can be referenced as an example of the removal of a predator from an ecosystem. In the early 1900s the government decided to eradicate wolves from Yellowstone National Park and by 1926 all wolves had been removed (Haines 1996). With the removal of ...
... The wolves of Yellowstone present a case study which can be referenced as an example of the removal of a predator from an ecosystem. In the early 1900s the government decided to eradicate wolves from Yellowstone National Park and by 1926 all wolves had been removed (Haines 1996). With the removal of ...
Chapter 11 power point
... As population is reduced in size, some of the genetic diversity is likely to be lost. Certain kinds of species are more likely to go extinct than others: • Species with small, dispersed populations – Successful breeding is difficult. ...
... As population is reduced in size, some of the genetic diversity is likely to be lost. Certain kinds of species are more likely to go extinct than others: • Species with small, dispersed populations – Successful breeding is difficult. ...
Altitudinal zonation among lizards of the genus
... Our previous studies reveal that lizard parasites (ectoparasitic mites and ticks, and the endoparasite Plasmodium) do not set Liolaemus altitudinallimits. Thermal tolerances do not appear to limit altitudinal distributions, although cold ambient temperatures dictate that only live-bearing species ca ...
... Our previous studies reveal that lizard parasites (ectoparasitic mites and ticks, and the endoparasite Plasmodium) do not set Liolaemus altitudinallimits. Thermal tolerances do not appear to limit altitudinal distributions, although cold ambient temperatures dictate that only live-bearing species ca ...
APPENDIX D: Specialist reports - Sazi Environmental Consulting
... perceived habitat types on the site, concentrating on moving through environmental gradients encountered within the habitat type in order to identify species and communities. This was continued until few to no new species were encountered. Any additional information on any other feature thought to h ...
... perceived habitat types on the site, concentrating on moving through environmental gradients encountered within the habitat type in order to identify species and communities. This was continued until few to no new species were encountered. Any additional information on any other feature thought to h ...
Pii - SLU
... senescent) and unlikely to mature to cone-bearing age. In general, LP is considered more competitive than SP when the two species occur together (Norgren, 1996; Elfving et al., 2001, this issue). 3.4. Suggestions on how to minimise possible adverse effects Do not allow LP on hilltops or upwind of ...
... senescent) and unlikely to mature to cone-bearing age. In general, LP is considered more competitive than SP when the two species occur together (Norgren, 1996; Elfving et al., 2001, this issue). 3.4. Suggestions on how to minimise possible adverse effects Do not allow LP on hilltops or upwind of ...
Chap.19 Extinction, conservation and restoration
... 19.4 Patterns of distribution among and within islands suggest that extinction may result from a decrease in competitive ability. • Immigrants to islands appear to be excellent competitors initially. • Species that colonize islands are usually abundant and widespread on the mainland; these qualitie ...
... 19.4 Patterns of distribution among and within islands suggest that extinction may result from a decrease in competitive ability. • Immigrants to islands appear to be excellent competitors initially. • Species that colonize islands are usually abundant and widespread on the mainland; these qualitie ...
Why Alien Invaders Succeed: Support for the Escape-from
... plants within an area that was separated from any other population by at least 3 km. Because most populations were not excessively large (mean Ⳳ SE: 66.1 Ⳳ 33.5 individuals; range 1–1,000), I was able to sample all individuals within each. In large populations (500–1,000), I sampled about 50% of the ...
... plants within an area that was separated from any other population by at least 3 km. Because most populations were not excessively large (mean Ⳳ SE: 66.1 Ⳳ 33.5 individuals; range 1–1,000), I was able to sample all individuals within each. In large populations (500–1,000), I sampled about 50% of the ...
Molecular phylogenetics of the hummingbird genus Coeligena
... et al., 2005; Schuchmann, 1999). Phylogenetic relationships among species in this group have been hypothesized mostly on the basis of similarities in coloration and distribution. Thus, it is important to determine the reliability of color traits to infer phylogenetic affinities. Fjeldså and Krabbe (1 ...
... et al., 2005; Schuchmann, 1999). Phylogenetic relationships among species in this group have been hypothesized mostly on the basis of similarities in coloration and distribution. Thus, it is important to determine the reliability of color traits to infer phylogenetic affinities. Fjeldså and Krabbe (1 ...
empirical evidence for an optimal body size in snakes
... slope 5 20.119, P , 0.001) snake species in island assemblages plotted against island area (Fig. 2). Body sizes of the largest species decreased with decreasing area whereas the body sizes of the smallest species increased with decreasing area. The regression lines for the body sizes of the largest ...
... slope 5 20.119, P , 0.001) snake species in island assemblages plotted against island area (Fig. 2). Body sizes of the largest species decreased with decreasing area whereas the body sizes of the smallest species increased with decreasing area. The regression lines for the body sizes of the largest ...
species - TavistockCollegeScience
... more evenly distributed between the three different species – it has greater species evenness Species richness is the number of different species in a habitat. The higher the number of species the greater the species richness Measured by taking random samples of a habitat and counting the number of ...
... more evenly distributed between the three different species – it has greater species evenness Species richness is the number of different species in a habitat. The higher the number of species the greater the species richness Measured by taking random samples of a habitat and counting the number of ...
Local-scale habitat influences morphological diversity of species
... partition habitat at the local scale but not at the macrohabitat scale. ...
... partition habitat at the local scale but not at the macrohabitat scale. ...
1 Optimal Public Control of Exotic Species: Preventing the Brown
... When prevention fails, eradication remains a viable solution unless the population spreads so rapidly, or is so difficult to detect and eliminate (as is the case for most insects, e.g.) that the population cannot be pushed below the extinction rate. Immediate eradication followed by a return to opti ...
... When prevention fails, eradication remains a viable solution unless the population spreads so rapidly, or is so difficult to detect and eliminate (as is the case for most insects, e.g.) that the population cannot be pushed below the extinction rate. Immediate eradication followed by a return to opti ...
Species pool size and invasibility of island communities: a null
... observed patterns in ecology. Explanations for this pattern are based on lower species richness on islands and the lower resistance of species-poor communities to invaders, but this argument needs re-examination. The important difference between islands and mainland is in the size of species pools, ...
... observed patterns in ecology. Explanations for this pattern are based on lower species richness on islands and the lower resistance of species-poor communities to invaders, but this argument needs re-examination. The important difference between islands and mainland is in the size of species pools, ...
Habitat and Niche
... there. The temperature, the amount of rainfall, the type of soil and other abiotic factors all have a significant role in determining the plants that invade an area. The plants then determine the animals that come to eat the plants, and so on. A habitat should not be confused with an ecosystem: the ...
... there. The temperature, the amount of rainfall, the type of soil and other abiotic factors all have a significant role in determining the plants that invade an area. The plants then determine the animals that come to eat the plants, and so on. A habitat should not be confused with an ecosystem: the ...
Dublin Core to Ensure Interoperability between Models Generated
... making for conservation and preservation of biodiversity. According to Peterson et al (2010) this area is “challenged to meet the demand for support to biodiversity conservation technology”. The species distribution modeling makes it possible to verify the changes in species distribution, changes in ...
... making for conservation and preservation of biodiversity. According to Peterson et al (2010) this area is “challenged to meet the demand for support to biodiversity conservation technology”. The species distribution modeling makes it possible to verify the changes in species distribution, changes in ...
Appendix S1. Details of Species Distribution Modeling and
... patches). This leads to a carrying capacity estimate of 1,173 per ha for age 60+ shrubs. While these values may underestimate the actual but theoretical ceiling possible, they provide a consistent upper bound that can be used across all scenarios for ranking and comparison of outcomes. Density depen ...
... patches). This leads to a carrying capacity estimate of 1,173 per ha for age 60+ shrubs. While these values may underestimate the actual but theoretical ceiling possible, they provide a consistent upper bound that can be used across all scenarios for ranking and comparison of outcomes. Density depen ...
Fragmentation
... Management (1933). The term refers to the fact that many organisms exhibit responses to the presence of habitat edges. Because edges represent the boundary between two habitat types, one may encounter representative species from both habitat types there. (This blended area is sometimes considered to ...
... Management (1933). The term refers to the fact that many organisms exhibit responses to the presence of habitat edges. Because edges represent the boundary between two habitat types, one may encounter representative species from both habitat types there. (This blended area is sometimes considered to ...
Niche partitioning at multiple scales facilitates coexistence among
... A theoretical dichotomy in community ecology distinguishes between mechanisms that stabilize species coexistence and those that cause neutral drift. Stable coexistence is predicted to occur in communities where competing species have niche-partitioning mechanisms that reduce interspecific competitio ...
... A theoretical dichotomy in community ecology distinguishes between mechanisms that stabilize species coexistence and those that cause neutral drift. Stable coexistence is predicted to occur in communities where competing species have niche-partitioning mechanisms that reduce interspecific competitio ...
Major Mitchell`s Cockato (Cacatua leadbeateri)
... treeless areas. This might have contributed to their decline in agricultural areas. Because they can travel quite long distance when foraging, there could be an overestimation of numbers because of duplication of records. Because Major Mitchell’s Cockatoos are not fast fliers and often feed on the g ...
... treeless areas. This might have contributed to their decline in agricultural areas. Because they can travel quite long distance when foraging, there could be an overestimation of numbers because of duplication of records. Because Major Mitchell’s Cockatoos are not fast fliers and often feed on the g ...
here - The Pew Charitable Trusts
... researchers from Portugal and Spain, managers, landowners, students, and public and non-governmental organizations. The 2-day event not only brought together specialists and stakeholders with an influence in lynx conservation but also gave representatives of civil society an opportunity to participat ...
... researchers from Portugal and Spain, managers, landowners, students, and public and non-governmental organizations. The 2-day event not only brought together specialists and stakeholders with an influence in lynx conservation but also gave representatives of civil society an opportunity to participat ...
Interpretive Context and Application of the Biological Condition
... of the trade of field biologists and as such, most biologists are quite comfortable with them. Figures 1 and 2 provide some context for interpreting Attributes VIII, IX and X. These models were developed by the EPA Large River Science Advisors workgroup in 1998 and provide a helpful review of fundam ...
... of the trade of field biologists and as such, most biologists are quite comfortable with them. Figures 1 and 2 provide some context for interpreting Attributes VIII, IX and X. These models were developed by the EPA Large River Science Advisors workgroup in 1998 and provide a helpful review of fundam ...
Key Publications - Details and Abstracts PDF, 286.38 KB
... the evolution and speciation of marine parasites are discussed as well. A detailed overview of biogeographical studies is given, with respect to latitudinal gradients in species diversity, reproductive strategies, and host ranges/specificity. Studies of marine parasites have contributed significantl ...
... the evolution and speciation of marine parasites are discussed as well. A detailed overview of biogeographical studies is given, with respect to latitudinal gradients in species diversity, reproductive strategies, and host ranges/specificity. Studies of marine parasites have contributed significantl ...
Proposal form to prescribe certain organisms as not new organisms
... in large quantities for augmentative biological control and are used extensively for the control of thrips in a range of crops, including in New Zealand. Macrotrachelia nigronitens has been purposefully introduced into Hawaii, and possibly also to California (Lariviere, 2012). Macrotrachelia sp. has ...
... in large quantities for augmentative biological control and are used extensively for the control of thrips in a range of crops, including in New Zealand. Macrotrachelia nigronitens has been purposefully introduced into Hawaii, and possibly also to California (Lariviere, 2012). Macrotrachelia sp. has ...
Interactions between granivorous and omnivorous ants in a desert
... establishment of colonies near mature nests (Ryti & Case, 1988b). Thus one ant species may increase when individuals of another are removed not just due to competition for ...
... establishment of colonies near mature nests (Ryti & Case, 1988b). Thus one ant species may increase when individuals of another are removed not just due to competition for ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.