Population and community
... Allee’s principle holds good. A number of plant species occur in groups, which may be in response to habitat preference or suitable climatic or environmental conditions or due to reproductive strategies. Within a group, the survival rates of species increase in response to the adverse environmental ...
... Allee’s principle holds good. A number of plant species occur in groups, which may be in response to habitat preference or suitable climatic or environmental conditions or due to reproductive strategies. Within a group, the survival rates of species increase in response to the adverse environmental ...
on the issues of triage in conservation
... ‗focal species‘ approach seems quite promising, as it provides a systematic procedure for selecting several focal species which are used to define the spatial, compositional and functional attributes that must be present in a landscape. Additionally, this approach identifies the main threats to biod ...
... ‗focal species‘ approach seems quite promising, as it provides a systematic procedure for selecting several focal species which are used to define the spatial, compositional and functional attributes that must be present in a landscape. Additionally, this approach identifies the main threats to biod ...
Territoriality in the South African Intertidal Limpet Scutellastra
... formations, wave exposure is minimal and the sites experience only gentle tidal flushing each day. General Methods We tested our general hypothesis that S. longicosta exhibit territoriality by performing two observational studies and one manipulation study in order to test the following three specif ...
... formations, wave exposure is minimal and the sites experience only gentle tidal flushing each day. General Methods We tested our general hypothesis that S. longicosta exhibit territoriality by performing two observational studies and one manipulation study in order to test the following three specif ...
Provided for non-commercial research and educational use. Not for
... In iteroparous organisms, fecundity often increases with age following reproductive maturity and then can decline at older ages. As such, age specificity of reproduction is an essential element for understanding the evolution of lifehistory strategies. Reproductive rate may increase with age when an ...
... In iteroparous organisms, fecundity often increases with age following reproductive maturity and then can decline at older ages. As such, age specificity of reproduction is an essential element for understanding the evolution of lifehistory strategies. Reproductive rate may increase with age when an ...
Instructor`s Manual to accompany Principles of Life
... • Species composition varies along environmental gradients • Several processes cause communities to change over time Species composition changes along environmental gradients, such as elevation or soil types. In any community there is ongoing colonization and extinction, and thus a steady turnover i ...
... • Species composition varies along environmental gradients • Several processes cause communities to change over time Species composition changes along environmental gradients, such as elevation or soil types. In any community there is ongoing colonization and extinction, and thus a steady turnover i ...
Natural Selection and Adaptation
... and contemporary evolutionary theory, the weaver ants’ behavior has the appearance of design because among many random genetic variations (mutations) affecting the behavior of an ancestral ant species, those displayed by Oecophylla enhanced survival and reproduction under its particular ecological c ...
... and contemporary evolutionary theory, the weaver ants’ behavior has the appearance of design because among many random genetic variations (mutations) affecting the behavior of an ancestral ant species, those displayed by Oecophylla enhanced survival and reproduction under its particular ecological c ...
Landscape Ecology www.AssignmentPoint.com Landscape ecology
... from physical islands to abstract patches of habitat by Levins' metapopulation model (which can be applied e.g. to forest islands in the agricultural landscape). This generalization spurred the growth of landscape ecology by providing conservation biologists a new tool to assess how habitat fragment ...
... from physical islands to abstract patches of habitat by Levins' metapopulation model (which can be applied e.g. to forest islands in the agricultural landscape). This generalization spurred the growth of landscape ecology by providing conservation biologists a new tool to assess how habitat fragment ...
Patterns of cooccurrences in a killifish
... rather than by taxonomy. Modularity was rarely detected, but nevertheless indicated a level of taxonomic organization not evident in nestedness or checkerboard indices. Identification of the spatial scale and organization at which ecological forces determine community structure is a basic requiremen ...
... rather than by taxonomy. Modularity was rarely detected, but nevertheless indicated a level of taxonomic organization not evident in nestedness or checkerboard indices. Identification of the spatial scale and organization at which ecological forces determine community structure is a basic requiremen ...
Of all the species that have lived on the Earth since life first
... The technical details of the solution will be covered in another paper that I am planning on writing. For the moment I simply note that the mean-field solution agrees excellently with the simulation results. This allows me to probe the behavior of the model in regimes in which the statistics from th ...
... The technical details of the solution will be covered in another paper that I am planning on writing. For the moment I simply note that the mean-field solution agrees excellently with the simulation results. This allows me to probe the behavior of the model in regimes in which the statistics from th ...
interspecific competition and niche notes
... interactions in a two-species system. They’re based on the same kind of logic as the logistic growth mode. The formulae are derived from the logistic population growth model by adding competition terms (competition coefficient times population size of the ‘other’ species) that account for the compet ...
... interactions in a two-species system. They’re based on the same kind of logic as the logistic growth mode. The formulae are derived from the logistic population growth model by adding competition terms (competition coefficient times population size of the ‘other’ species) that account for the compet ...
Unit 5 - kehsscience.org
... Population Graphs Graphing populations allows us to observe changes in population numbers over time, infer why the changes are occurring, and make predictions as to how populations may change in the future. Predator-Prey relationships are important because they keep populations in balance in the ec ...
... Population Graphs Graphing populations allows us to observe changes in population numbers over time, infer why the changes are occurring, and make predictions as to how populations may change in the future. Predator-Prey relationships are important because they keep populations in balance in the ec ...
Geospiza heliobates, Mangrove Finch
... The habitat of this species is protected within the Galápagos National Park and, in 1979, the islands were declared a World Heritage Site, although this was classified as threatened in 2007. An action plan was published 2010 (in English and Spanish) following a workshop in 2008. Predator control is ...
... The habitat of this species is protected within the Galápagos National Park and, in 1979, the islands were declared a World Heritage Site, although this was classified as threatened in 2007. An action plan was published 2010 (in English and Spanish) following a workshop in 2008. Predator control is ...
Bruun_Oikos2006 - Research Portal
... formation of a viable population at a site requires successful dispersal, followed by establishment, survival and reproduction. This means that two factors are constraining local species richness in communities, 1) the number of species that have evolved to fit the ...
... formation of a viable population at a site requires successful dispersal, followed by establishment, survival and reproduction. This means that two factors are constraining local species richness in communities, 1) the number of species that have evolved to fit the ...
Levels of Selection - Evolutionary Biology
... • shifts from individual life to life in social groups • part-time social groups of (generally) unrelated individuals are formed during sexual reproduction • r is usually low between parents (that is kind of the point of sex) • r relatively high between offspring, and parents and offspring (but t ...
... • shifts from individual life to life in social groups • part-time social groups of (generally) unrelated individuals are formed during sexual reproduction • r is usually low between parents (that is kind of the point of sex) • r relatively high between offspring, and parents and offspring (but t ...
Plight of the Pollinators: Factors of Pollinator Decline
... millions of different species that live on our planet, as well as the genetic differences within species. It also refers to the multitude of different ecosystems in which species form unique communities, interacting with one another and the air, water and soil. • genetic diversity • species diversit ...
... millions of different species that live on our planet, as well as the genetic differences within species. It also refers to the multitude of different ecosystems in which species form unique communities, interacting with one another and the air, water and soil. • genetic diversity • species diversit ...
letter
... bear in mind that the location of the threshold is likely to vary among communities. This is due to the fact that extinction processes will be affected by the biology of the species. Species with long dispersal distances, for example, would perceive their habitat as fragmented for higher values of m ...
... bear in mind that the location of the threshold is likely to vary among communities. This is due to the fact that extinction processes will be affected by the biology of the species. Species with long dispersal distances, for example, would perceive their habitat as fragmented for higher values of m ...
The role of habitat connectivity and landscape geometry in
... Forbes, A. E. and Chase, J. M. 2002. The role of habitat connectivity and landscape geometry in experimental zooplankton metacommunities. – Oikos 96: 433– 440. Theory predicts that inter-patch dispersal rates and patterns of patch heterogeneity both have the potential to alter patterns of local and ...
... Forbes, A. E. and Chase, J. M. 2002. The role of habitat connectivity and landscape geometry in experimental zooplankton metacommunities. – Oikos 96: 433– 440. Theory predicts that inter-patch dispersal rates and patterns of patch heterogeneity both have the potential to alter patterns of local and ...
Insert title here - Organization of American States
... a variety of schools, simplifying (or at least not increasing “paperwork” burdens). Produce a matrix of the key similarities and differences between each, can some “fit within others”, and/or where strong logical links exist. Scale issues -- “global”, “Americas” and “sub regional”. Matrix would help ...
... a variety of schools, simplifying (or at least not increasing “paperwork” burdens). Produce a matrix of the key similarities and differences between each, can some “fit within others”, and/or where strong logical links exist. Scale issues -- “global”, “Americas” and “sub regional”. Matrix would help ...
Competition It`s a struggle, a fight, two entities opposing each other
... boasts high species richness (diversity). The more generalist an organism is, the better chances it has to co-exist with its conspecifics (other members of the same species) and other taxa. Animals and plants that have specific life history requirements, like cavity-nesting birds, plants with ph-spe ...
... boasts high species richness (diversity). The more generalist an organism is, the better chances it has to co-exist with its conspecifics (other members of the same species) and other taxa. Animals and plants that have specific life history requirements, like cavity-nesting birds, plants with ph-spe ...
Natives adapting to invasive species: ecology, genes
... (or risks lower) for genetically distant colonists. The relatively more novel genotype-by-environment interactions represented by new genera (rather than species in a genus already present) colonizing a habitat may represent an instantaneous ‘‘niche-creation’’ process. In such cases, where colonizat ...
... (or risks lower) for genetically distant colonists. The relatively more novel genotype-by-environment interactions represented by new genera (rather than species in a genus already present) colonizing a habitat may represent an instantaneous ‘‘niche-creation’’ process. In such cases, where colonizat ...