Heterospecific attraction among forest birds: a review
... colonizing individuals use other species presence as cues to profitable breeding sites. Our experimental studies in Fennoscandia and North America have shown that density and species richness of migrant birds breeding in the forests respond positively to experimentally augmented titmice densities. W ...
... colonizing individuals use other species presence as cues to profitable breeding sites. Our experimental studies in Fennoscandia and North America have shown that density and species richness of migrant birds breeding in the forests respond positively to experimentally augmented titmice densities. W ...
The intermediate disturbance hypothesis should be
... intermediate disturbance levels. A review of over 100 published diversity–disturbance relationships found that the predicted peak of diversity at intermediate disturbance levels rarely occurs (< 20% of studies; [8]). A more recent review reports the same result [9]. It could be argued that nature is ...
... intermediate disturbance levels. A review of over 100 published diversity–disturbance relationships found that the predicted peak of diversity at intermediate disturbance levels rarely occurs (< 20% of studies; [8]). A more recent review reports the same result [9]. It could be argued that nature is ...
Trophic interactions and range limits: the diverse roles of
... and so the predator may permit the prey to persist in areas where otherwise it would be absent. One obvious way this can happen is if the predator is a generalist, and attacks other species that more strongly harm the focal prey than does the predator itself (e.g. competitors or intraguild predators ...
... and so the predator may permit the prey to persist in areas where otherwise it would be absent. One obvious way this can happen is if the predator is a generalist, and attacks other species that more strongly harm the focal prey than does the predator itself (e.g. competitors or intraguild predators ...
Phloem-feeding specialists sharing a host tree: resource partitioning
... Niche separation at the tree level Only 39 of more than 200 trees surveyed were colonized by more than one species at densities suitable for analysis. This shows that niche separation at the tree level may be common. However, as explained in the Methods section, colonization of trees is likely to re ...
... Niche separation at the tree level Only 39 of more than 200 trees surveyed were colonized by more than one species at densities suitable for analysis. This shows that niche separation at the tree level may be common. However, as explained in the Methods section, colonization of trees is likely to re ...
Fresh Water Habitats and Biodiversity (Edexcel AS)
... the number of samples. Tets the sediment – not just the water!! Lead and zinc are insoluble in neutral to alkaline water and will not be present in the river water samples – they are ‘locked up’ in the river sediments – this will be acidified during the chemical test which will reveal the actual ext ...
... the number of samples. Tets the sediment – not just the water!! Lead and zinc are insoluble in neutral to alkaline water and will not be present in the river water samples – they are ‘locked up’ in the river sediments – this will be acidified during the chemical test which will reveal the actual ext ...
The effects of invasive North American beavers on riparian plant
... (Table 1). In beaver meadows 63 species were found (94% of all surveyed riparian species). Only 28 species (41% of the total riparian assemblage) inhabited forested riparian zones. Herbaceous species richness per survey plot significantly increased in meadows, when compared to forested sites, by nea ...
... (Table 1). In beaver meadows 63 species were found (94% of all surveyed riparian species). Only 28 species (41% of the total riparian assemblage) inhabited forested riparian zones. Herbaceous species richness per survey plot significantly increased in meadows, when compared to forested sites, by nea ...
Do exotic beavers engineer differently in sub-Antarctic
... (Table 1). In beaver meadows 63 species were found (94% of all surveyed riparian species). Only 28 species (41% of the total riparian assemblage) inhabited forested riparian zones. Herbaceous species richness per survey plot significantly increased in meadows, when compared to forested sites, by nea ...
... (Table 1). In beaver meadows 63 species were found (94% of all surveyed riparian species). Only 28 species (41% of the total riparian assemblage) inhabited forested riparian zones. Herbaceous species richness per survey plot significantly increased in meadows, when compared to forested sites, by nea ...
Vanellus gregarius, Sociable Lapwing
... a high dung abundance and vegetation is short (Watson et al. 2006). Steppes that are densely vegetated may be avoided (strong style="font-weight: normal;">Johnsgard 1981), however areas with a low percentage of bare ground and high percentage of tall vegetation are preferred by chicks, and may be im ...
... a high dung abundance and vegetation is short (Watson et al. 2006). Steppes that are densely vegetated may be avoided (strong style="font-weight: normal;">Johnsgard 1981), however areas with a low percentage of bare ground and high percentage of tall vegetation are preferred by chicks, and may be im ...
Abundance, Diversity, and Activity of Ants (Hymenoptera: Formicidae)
... P ⫽ 0.0893), which indicates there is a trend of interaction between “forest” and “treatment.” For ant species richness and diversity data, the two forests were combined in the analysis. The Þxed effects are “forest,” “treatment,” and “forest ⫻ treatment.” The random effects are “block” and “block ⫻ ...
... P ⫽ 0.0893), which indicates there is a trend of interaction between “forest” and “treatment.” For ant species richness and diversity data, the two forests were combined in the analysis. The Þxed effects are “forest,” “treatment,” and “forest ⫻ treatment.” The random effects are “block” and “block ⫻ ...
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 ...
Individualscale variation, speciesscale differences: inference
... at a specific temperature T ¢. Not only does the variation increase from conditional to marginal, but the rank of species mean values reverses from marginal in Fig. 2e to conditional in Fig. 2c. The answer to the original question (which species occupies the wetter sites?) is, in aggregate, beech. T ...
... at a specific temperature T ¢. Not only does the variation increase from conditional to marginal, but the rank of species mean values reverses from marginal in Fig. 2e to conditional in Fig. 2c. The answer to the original question (which species occupies the wetter sites?) is, in aggregate, beech. T ...
Food Web Diameter: Two Degrees of Separation
... as in other complex, small-world networks12,30, the adage would have been undermined by the suggestion that substantial fractions of species are functionally isolated from one another. Our findings appear to make this possibility unlikely. Overall, the robustness of short characteristic path length ...
... as in other complex, small-world networks12,30, the adage would have been undermined by the suggestion that substantial fractions of species are functionally isolated from one another. Our findings appear to make this possibility unlikely. Overall, the robustness of short characteristic path length ...
Asymmetric specialization
... with a subset of the interaction partners of more generalized species. A nested pattern of interactions necessarily means asymmetric specialization between interaction partners. However, Bascompte et al.’s analysis has some important differences with our study. First, although the existence of a nes ...
... with a subset of the interaction partners of more generalized species. A nested pattern of interactions necessarily means asymmetric specialization between interaction partners. However, Bascompte et al.’s analysis has some important differences with our study. First, although the existence of a nes ...
a population. - kimscience.com
... What do ecologists study? Populations are dynamic and exhibit attributes that are not shown by the individuals themselves. Geographic range: area inhabited Population size: total number of organisms in the population. Population density: number of organisms per unit area. Population distribution: l ...
... What do ecologists study? Populations are dynamic and exhibit attributes that are not shown by the individuals themselves. Geographic range: area inhabited Population size: total number of organisms in the population. Population density: number of organisms per unit area. Population distribution: l ...
Biology 423 – Exam # 1
... 5. (6 pts) When Likens and Bormann deforested part of Hubbard Brook Watershed, there were some interesting effects. In particular, (a) describe how the net output of Ca+, NH4, NO3 and S changed. (b) What are some possible explanations for these changes? (one of them we weren’t able to figure out in ...
... 5. (6 pts) When Likens and Bormann deforested part of Hubbard Brook Watershed, there were some interesting effects. In particular, (a) describe how the net output of Ca+, NH4, NO3 and S changed. (b) What are some possible explanations for these changes? (one of them we weren’t able to figure out in ...
Chapter 41
... The top-down model, also called the trophic cascade model, proposes that control comes from the trophic level above In this case, predators control herbivores, which in ...
... The top-down model, also called the trophic cascade model, proposes that control comes from the trophic level above In this case, predators control herbivores, which in ...
Alicia_Ref-Titles - Western Oregon University
... accuracy of 55%, while the overall accuracy for T. chinensis was 85%. Models for the generalist species had varying performances, poor evaluations, and inconsistent results. This may be a result of a generalist's capability to persist in a wide range of environmental conditions that are not easily d ...
... accuracy of 55%, while the overall accuracy for T. chinensis was 85%. Models for the generalist species had varying performances, poor evaluations, and inconsistent results. This may be a result of a generalist's capability to persist in a wide range of environmental conditions that are not easily d ...
Euastacus dharawalus, Fitzroy Falls Crayfish
... Bifenthrin is a common insecticide used for the control of termites and borers in timber, insect pests in agricultural crops and turf, and for general pest control (spiders, ants, fleas, flies and mosquitoes). It is extremely toxic to terrestrial and aquatic insects, crustaceans and fish, disabling ...
... Bifenthrin is a common insecticide used for the control of termites and borers in timber, insect pests in agricultural crops and turf, and for general pest control (spiders, ants, fleas, flies and mosquitoes). It is extremely toxic to terrestrial and aquatic insects, crustaceans and fish, disabling ...
Chesson, P, and Kuang, J.J. 2008. The interaction between
... The quantities ajj and aij now represent the total strengths of intraspecific and interspecific density dependence, combining both competition and predation. Thus, ajj measures the combined strengths of the feedback loops from species j to species j through both resources and predators, whereas aij ...
... The quantities ajj and aij now represent the total strengths of intraspecific and interspecific density dependence, combining both competition and predation. Thus, ajj measures the combined strengths of the feedback loops from species j to species j through both resources and predators, whereas aij ...
PRA Report Liberibacter and Bactericera
... Trade for ornamental purposes can occur both via the internet and by direct retail at nurseries. The plant is widely available in garden centres and nurseries in Europe, in France, Germany, the United Kingdom and Italy. The species is still sold in EPPO countries, and is already established in Belgi ...
... Trade for ornamental purposes can occur both via the internet and by direct retail at nurseries. The plant is widely available in garden centres and nurseries in Europe, in France, Germany, the United Kingdom and Italy. The species is still sold in EPPO countries, and is already established in Belgi ...
The role of behavioural variation in the invasion of
... front relative to their conspecifics from older, established populations (Phillips et al. 2010b; Phillips et al. 2008a). Empirical evidence for the evolution of behaviours facilitating population growth is, however, weaker. Higher growth rates have been found in invasion front populations of cane to ...
... front relative to their conspecifics from older, established populations (Phillips et al. 2010b; Phillips et al. 2008a). Empirical evidence for the evolution of behaviours facilitating population growth is, however, weaker. Higher growth rates have been found in invasion front populations of cane to ...
PDF
... pair of experimental and control plots. Each control and its paired experimental plot were separated by approximately 100 m; control 1 was located at an elevation of 390 m, whereas experimental 1 was at an elevation of 400 m; control and experimental 2 were at an elevation of 470 m; and control and ...
... pair of experimental and control plots. Each control and its paired experimental plot were separated by approximately 100 m; control 1 was located at an elevation of 390 m, whereas experimental 1 was at an elevation of 400 m; control and experimental 2 were at an elevation of 470 m; and control and ...
Habitat Fragmentation Effects on Birds in Grasslands
... 1996). And it is timely, because efforts are now being made to restore and preserve grasslands and wetlands. Furthermore, grassland birds are of special concern. As a group, they have suffered more serious population declines than other groups of birds (Peterjohn and Sauer 1999). Research activity o ...
... 1996). And it is timely, because efforts are now being made to restore and preserve grasslands and wetlands. Furthermore, grassland birds are of special concern. As a group, they have suffered more serious population declines than other groups of birds (Peterjohn and Sauer 1999). Research activity o ...
Detail programme_Abstractsocx - 144.6 kB
... manage ecosystem services given by biodiversity. Two important challenges are 1) dealing with pests in a sustainable way and 2) stopping the decline of pollinisators. Indeed, biological control and pollination are two crucial regulating services for agroecosystem’s management and moreover, they soul ...
... manage ecosystem services given by biodiversity. Two important challenges are 1) dealing with pests in a sustainable way and 2) stopping the decline of pollinisators. Indeed, biological control and pollination are two crucial regulating services for agroecosystem’s management and moreover, they soul ...
A mechanistic model of a mutualism and its ecological and
... by playing the same strategy as the population (p1N ) for some given strategy for the population, then that given strategy is an uninvadable and hence an ESS (MaynardSmith and Price, 1973). However, in this particular application to mutualism, intraspecific competition is independent of the strategy ...
... by playing the same strategy as the population (p1N ) for some given strategy for the population, then that given strategy is an uninvadable and hence an ESS (MaynardSmith and Price, 1973). However, in this particular application to mutualism, intraspecific competition is independent of the strategy ...