Heterospecific courtship, minority effects and niche separation
... conspecific density (3 : 3 and 5 : 1). If the mating probability instead is frequency dependent and mainly determined by the relative species density, we expect a similar pattern with an increasing proportion of matings from the 1 : 5 to the 3 : 3 and 5 : 1 conditions, but with the important excepti ...
... conspecific density (3 : 3 and 5 : 1). If the mating probability instead is frequency dependent and mainly determined by the relative species density, we expect a similar pattern with an increasing proportion of matings from the 1 : 5 to the 3 : 3 and 5 : 1 conditions, but with the important excepti ...
What are ecological communities?
... Firstly, the various crop species in the mixture can be chosen so that they do not compete strongly with each other, i.e. their niche overlap is sufficiently low. Secondly, an increase in crop performance can arise if the species are chosen so that one species modifies the environment in a positive ...
... Firstly, the various crop species in the mixture can be chosen so that they do not compete strongly with each other, i.e. their niche overlap is sufficiently low. Secondly, an increase in crop performance can arise if the species are chosen so that one species modifies the environment in a positive ...
USER`S GUIDE TO BIODIVERSITY (SPECIES) NATIONAL
... bias etc contained in the original work. Many bird populations are highly mobile and their status within individual zones can change relatively rapidly. ...
... bias etc contained in the original work. Many bird populations are highly mobile and their status within individual zones can change relatively rapidly. ...
8 Habitat matrix effects on the structure and dynamic
... terrestrial adults that may move among ponds, as insects and amphibians do. The metacommunity perspective differs from metapopulation perspectives, in that the principal issue in metapopulation theory is to address what determines the persistence of a metapopulation in a system of connected habitats ...
... terrestrial adults that may move among ponds, as insects and amphibians do. The metacommunity perspective differs from metapopulation perspectives, in that the principal issue in metapopulation theory is to address what determines the persistence of a metapopulation in a system of connected habitats ...
Why Are Invasive Alien Species a Problem?
... “Alien” species are those species that have moved outside their natural range into an area where they would not normally be found. One of the best opportunities we have to reduce the impact of invasive alien species is to prevent them from becoming established in the first place. To do this, we need ...
... “Alien” species are those species that have moved outside their natural range into an area where they would not normally be found. One of the best opportunities we have to reduce the impact of invasive alien species is to prevent them from becoming established in the first place. To do this, we need ...
Ecosystem Loss and Fragmentation: Synthesis
... their genetic material) across a landscape. Generally speaking, habitat loss is of far greater consequence to biological diversity than habitat fragmentation (Fahrig, 2003). ...
... their genetic material) across a landscape. Generally speaking, habitat loss is of far greater consequence to biological diversity than habitat fragmentation (Fahrig, 2003). ...
1 Breeding Phenology of an Amphibian Community in a Mediterranean Area
... (Salvador & Carrascal 1990; Díaz-Paniagua 1992; Jakob et al. 2003). In these environments, the risk of reproductive failure depends on the length of the hydroperiod and the annual rainfall (Jakob et al. 2003). In dry years, lack of spring precipitations can cause substantial, if not complete, reprod ...
... (Salvador & Carrascal 1990; Díaz-Paniagua 1992; Jakob et al. 2003). In these environments, the risk of reproductive failure depends on the length of the hydroperiod and the annual rainfall (Jakob et al. 2003). In dry years, lack of spring precipitations can cause substantial, if not complete, reprod ...
Effect of changing grain size on the predictive performance and
... distribution of an invasion and for land managers as they prioritize how and where to monitor for invasive plant populations. Model performance at different resolutions can indicate at what scale(s) the relationship between the environment and a species’ distribution is likely the dominating proces ...
... distribution of an invasion and for land managers as they prioritize how and where to monitor for invasive plant populations. Model performance at different resolutions can indicate at what scale(s) the relationship between the environment and a species’ distribution is likely the dominating proces ...
Biotic modifiers, environmental modulation and species
... Jones et al. (1994), and which has inspired a large number of further studies: at the time of submission of this article, Jones et al. (1994) had been cited 1416 times. A useful overview of the development of ecosystem engineers is given in Wright & Jones (2006). Ecosystem engineers are species that ...
... Jones et al. (1994), and which has inspired a large number of further studies: at the time of submission of this article, Jones et al. (1994) had been cited 1416 times. A useful overview of the development of ecosystem engineers is given in Wright & Jones (2006). Ecosystem engineers are species that ...
mammals - The Woodland Trust
... ability to fly and their use of echolocation to navigate the night skies and find their prey. Their life history traits are also similar, with a complex annual cycle of autumn mating followed by winter hibernation and the gathering of females in spring to give birth, and their extraordinary longevit ...
... ability to fly and their use of echolocation to navigate the night skies and find their prey. Their life history traits are also similar, with a complex annual cycle of autumn mating followed by winter hibernation and the gathering of females in spring to give birth, and their extraordinary longevit ...
Soil detritivore macro-invertebrate assemblages throughout a
... interesting models where vertical stratification of vegetation and tree composition are reduced to their simplest expression, making them about the most simplified forests [7]. In such systems, much attention has been paid to plant community diversity [5, 12] and most works on soil detritivore inver ...
... interesting models where vertical stratification of vegetation and tree composition are reduced to their simplest expression, making them about the most simplified forests [7]. In such systems, much attention has been paid to plant community diversity [5, 12] and most works on soil detritivore inver ...
Here Today, Gone Tomorrow
... "Our ancestors viewed the Earth as rich and bountiful, which it is. Many people in the past also saw nature as inexhaustibly sustainable, which we now know is the case only if we care for it. It is not difficult to forgive destruction in the past which resulted from ignorance. Today, however, we hav ...
... "Our ancestors viewed the Earth as rich and bountiful, which it is. Many people in the past also saw nature as inexhaustibly sustainable, which we now know is the case only if we care for it. It is not difficult to forgive destruction in the past which resulted from ignorance. Today, however, we hav ...
RG report
... Combinations of several retrospective vegetation history and archaeological methods will provide information on long-term natural changes, human settlement, timber logging, grazing pressure, economics, and human wellbeing. The project will thereby be able to analyse patterns in biodiversity and ecos ...
... Combinations of several retrospective vegetation history and archaeological methods will provide information on long-term natural changes, human settlement, timber logging, grazing pressure, economics, and human wellbeing. The project will thereby be able to analyse patterns in biodiversity and ecos ...
![[homepage] INVASIVE SPECIES Non-native, invasive species of](http://s1.studyres.com/store/data/004749739_1-ccf5856f6bf04e30aa78211725216e08-300x300.png)
[homepage] INVASIVE SPECIES Non-native, invasive species of
... There are at least 53 invasive species of reptiles in the United States, the majority being in Florida and Hawaii. One of the most problematic invasive reptiles, however, has been in Guam. The Brown Tree Snake [http://www.fort.usgs.gov/resources/education/bts/bioeco/btsnake.asp] was accidentally let ...
... There are at least 53 invasive species of reptiles in the United States, the majority being in Florida and Hawaii. One of the most problematic invasive reptiles, however, has been in Guam. The Brown Tree Snake [http://www.fort.usgs.gov/resources/education/bts/bioeco/btsnake.asp] was accidentally let ...
Linking ecological niche, community ecology and biogeography
... model is hampered by the parameterization, which may be based either on expert knowledge or on data (Dormann et al., 2012; Hartig et al., 2012; Marion et al., 2012). Parameterization based on data (i.e. inverse modelling) seems currently feasible only for single-species models representing only one ...
... model is hampered by the parameterization, which may be based either on expert knowledge or on data (Dormann et al., 2012; Hartig et al., 2012; Marion et al., 2012). Parameterization based on data (i.e. inverse modelling) seems currently feasible only for single-species models representing only one ...
Invasiveness, invasibility and the role of environmental
... Invasion ecology, the study of how organisms spread in habitats to which they are not native, asks both about the invasiveness of species and the invasibility of habitats: Which species are most likely to become invasive? Which habitats are most susceptible to invasion? To set the stage for consider ...
... Invasion ecology, the study of how organisms spread in habitats to which they are not native, asks both about the invasiveness of species and the invasibility of habitats: Which species are most likely to become invasive? Which habitats are most susceptible to invasion? To set the stage for consider ...
Gerbils and Heteromyids – Interspecific Competition and the Spatio
... With regard to time, the preference for the early part of the night by both species is consistent with the availability of resources in the area. The strong afternoon winds that occur almost daily are probably responsible for the daily renewal of seeds by uncovering seeds buried in the ground (Kotle ...
... With regard to time, the preference for the early part of the night by both species is consistent with the availability of resources in the area. The strong afternoon winds that occur almost daily are probably responsible for the daily renewal of seeds by uncovering seeds buried in the ground (Kotle ...
What Is an Ecosystem?
... Succession, continued • An ecosystem responds to change in such a way that the ecosystem is restored to equilibrium. • For example, when a tree falls down in a rain forest, the newly vacant patch proceeds through succession until the patch returns to its original state. • Sometimes, the ecosystem wi ...
... Succession, continued • An ecosystem responds to change in such a way that the ecosystem is restored to equilibrium. • For example, when a tree falls down in a rain forest, the newly vacant patch proceeds through succession until the patch returns to its original state. • Sometimes, the ecosystem wi ...
Plant communities at the periphery of the Atlantic rain forest
... ecotones. Conservation policies regarding the Atlantic forest strongly emphasize the core formation (i.e. the rainforest stricto sensu) rather than the marginal habitats (e.g. restingas, swamps, and high altitude campos) and species that are rare/endemic. To discuss this issue I revisit a hypothesis ...
... ecotones. Conservation policies regarding the Atlantic forest strongly emphasize the core formation (i.e. the rainforest stricto sensu) rather than the marginal habitats (e.g. restingas, swamps, and high altitude campos) and species that are rare/endemic. To discuss this issue I revisit a hypothesis ...
Sinking ships: conservation options for endemic taxa threatened by
... and Ovaskainen 2000). In general, conservation strategies that support increasing population size, increasing the total number of populations, and connecting habitats of existing populations are supported by theory. 4.2 Genetics Genetic diversity and the speed at which species can adapt to GCC is a ...
... and Ovaskainen 2000). In general, conservation strategies that support increasing population size, increasing the total number of populations, and connecting habitats of existing populations are supported by theory. 4.2 Genetics Genetic diversity and the speed at which species can adapt to GCC is a ...
Ecosystems in Action: Lessons from Marine Ecology about Recovery
... This information can have strong management implications, because it may signal the range of likely impacts from a given environmental change and inform choices among different management strategies. Unfortunately, however, information about ecological recovery is often incomplete or indirect. The b ...
... This information can have strong management implications, because it may signal the range of likely impacts from a given environmental change and inform choices among different management strategies. Unfortunately, however, information about ecological recovery is often incomplete or indirect. The b ...
Regeneration of Oak and Northern Hardwood Forests
... • In presettlement time mixed oak and pine forests dominated many of the dry and dry-mesic ecosystems of northern Lower Michigan. • Although oak overstory trees are present today, their regeneration is at risk due to a combination of fire exclusion and herbivory by deer. ...
... • In presettlement time mixed oak and pine forests dominated many of the dry and dry-mesic ecosystems of northern Lower Michigan. • Although oak overstory trees are present today, their regeneration is at risk due to a combination of fire exclusion and herbivory by deer. ...
Spotted-tailed Quoll: Endangered species
... Retain and improve patches of forest Leave large fallen logs intact Burn in patchy mosaics. Avoid intense widespread fire. Connect isolated habitat patches by planting corridors of local native plant species Drive carefully in areas where quolls occur, slow down or stop if one is on the road. Report ...
... Retain and improve patches of forest Leave large fallen logs intact Burn in patchy mosaics. Avoid intense widespread fire. Connect isolated habitat patches by planting corridors of local native plant species Drive carefully in areas where quolls occur, slow down or stop if one is on the road. Report ...
Reconciliation ecology
Reconciliation ecology is the branch of ecology which studies ways to encourage biodiversity in human-dominated ecosystems. Michael Rosenzweig first articulated the concept in his book Win-Win Ecology, based on the theory that there is not enough area for all of earth’s biodiversity to be saved within designated nature preserves. Therefore, humans should increase biodiversity in human-dominated landscapes. By managing for biodiversity in ways that do not decrease human utility of the system, it is a ""win-win"" situation for both human use and native biodiversity. The science is based in the ecological foundation of human land-use trends and species-area relationships. It has many benefits beyond protection of biodiversity, and there are numerous examples of it around the globe. Aspects of reconciliation ecology can already be found in management legislation, but there are challenges in both public acceptance and ecological success of reconciliation attempts.