Some Basic Principles of Habitat Use
... median (i.e., based on resources available for reproduction), to high (i.e., based on resources available for population persistence). Habitat quality should be linked with demographics, not vegetative features, if it is to be a useful measure. For example, Ables and Ables (1987) evaluated habitat q ...
... median (i.e., based on resources available for reproduction), to high (i.e., based on resources available for population persistence). Habitat quality should be linked with demographics, not vegetative features, if it is to be a useful measure. For example, Ables and Ables (1987) evaluated habitat q ...
do plants lose water at night?
... Night-time stomatal opening appears to be a potentially widespread behaviour in plants, which leads to questions about the relative costs and/or bene®ts of night-time water loss. There may be no substantial water `cost' of incomplete night-time stomatal closure, although this seems unlikely for the ...
... Night-time stomatal opening appears to be a potentially widespread behaviour in plants, which leads to questions about the relative costs and/or bene®ts of night-time water loss. There may be no substantial water `cost' of incomplete night-time stomatal closure, although this seems unlikely for the ...
Succession: A Closer Look
... Recently, ecologists have been developing mathematical models to better characterize and predict successional changes. For example, The Resource Ratio Hypothesis, proposed by David Tilman (1985), models successional shifts in plant communities based on the assumption that succession is driven by a t ...
... Recently, ecologists have been developing mathematical models to better characterize and predict successional changes. For example, The Resource Ratio Hypothesis, proposed by David Tilman (1985), models successional shifts in plant communities based on the assumption that succession is driven by a t ...
scale-dependent responses of plant biodiversity to nitrogen
... Abstract. Experimental studies demonstrating that nitrogen (N) enrichment reduces plant diversity within individual plots have led to the conclusion that anthropogenic N enrichment is a threat to global biodiversity. These conclusions overlook the influence of spatial scale, however, as N enrichment ...
... Abstract. Experimental studies demonstrating that nitrogen (N) enrichment reduces plant diversity within individual plots have led to the conclusion that anthropogenic N enrichment is a threat to global biodiversity. These conclusions overlook the influence of spatial scale, however, as N enrichment ...
Grasslands, Shrublands, Deserts
... often degenerated woodland or grassland, as seen in many parts of coastal Greece and the Near East where topsoil has eroded. Desert and shrub habitats in Mediterranean countries are the product of thousands of years of abuse of the land, beginning with forest clearance for grazing and agriculture. S ...
... often degenerated woodland or grassland, as seen in many parts of coastal Greece and the Near East where topsoil has eroded. Desert and shrub habitats in Mediterranean countries are the product of thousands of years of abuse of the land, beginning with forest clearance for grazing and agriculture. S ...
Definitions of terms relating to biological diversity
... restriction of access to or exploitation of the resource Connectedness: (n) characteristic of the distribution of habitats in a landscape, reflecting the ease with which organisms of a given taxon can disperse between habitat patches Connectivity: (n) degree to which disjunct populations function as ...
... restriction of access to or exploitation of the resource Connectedness: (n) characteristic of the distribution of habitats in a landscape, reflecting the ease with which organisms of a given taxon can disperse between habitat patches Connectivity: (n) degree to which disjunct populations function as ...
CONCEPTUAL SYNTHESIS IN COMMUNITY ECOLOGY
... For each of the latter three processes—speciation, drift, and dispersal—conceptual developments were motivated by a perceived lack of emphasis in the literature on the importance of the process in question. Selection, in the form of deterministic interactions among species and between species and th ...
... For each of the latter three processes—speciation, drift, and dispersal—conceptual developments were motivated by a perceived lack of emphasis in the literature on the importance of the process in question. Selection, in the form of deterministic interactions among species and between species and th ...
Flora and Vegetation
... endemism with 60 per cent of the flora occurring nowhere else on earth. Many of these species occur in small, localised populations and this distribution makes them more vulnerable to environmental disturbance. The distribution and variability of Western Australia’s vegetation reflects that of the f ...
... endemism with 60 per cent of the flora occurring nowhere else on earth. Many of these species occur in small, localised populations and this distribution makes them more vulnerable to environmental disturbance. The distribution and variability of Western Australia’s vegetation reflects that of the f ...
2016.17 Ecology, Ongoing Expectations
... of time that it takes for an ecosystem to progress from pioneer species to a climax community. ...
... of time that it takes for an ecosystem to progress from pioneer species to a climax community. ...
TOPIC 2 - MARKING SCHEME - International School Bangkok
... i.e. in southern hemisphere spring and autumn; low value in January; in southern hot summer; other low points May–August; i.e. in southern winter; fluctuations may reflect life-cycles of insects; and/or variations in plant productivity; peaks may represent carrying capacity; troughs may be result of ...
... i.e. in southern hemisphere spring and autumn; low value in January; in southern hot summer; other low points May–August; i.e. in southern winter; fluctuations may reflect life-cycles of insects; and/or variations in plant productivity; peaks may represent carrying capacity; troughs may be result of ...
What enables coexistence in plant communities? Weak versus
... is divided into patches on a grid. The grid has 20 × 40 patches (200 × 400 patches in the multi-species competition); each patch (10 m × 10 m) can host a mature tree, thus the simulated forest covers an area of 8 ha. After competition for space among seeds and seedlings, respecitively, a patch accom ...
... is divided into patches on a grid. The grid has 20 × 40 patches (200 × 400 patches in the multi-species competition); each patch (10 m × 10 m) can host a mature tree, thus the simulated forest covers an area of 8 ha. After competition for space among seeds and seedlings, respecitively, a patch accom ...
the macroevolutionary consequences of ecological differences
... equilibrium may be very long. Moreover, patterns in rank species abundance and diversity predicted in this transient phase fit data from real communities extremely well (Hubbell 2001). This model has been extremely controversial, mainly because it postulates no coexistence mechanisms that would prom ...
... equilibrium may be very long. Moreover, patterns in rank species abundance and diversity predicted in this transient phase fit data from real communities extremely well (Hubbell 2001). This model has been extremely controversial, mainly because it postulates no coexistence mechanisms that would prom ...
19-Population ecology
... However, this method is usually not logistically or economically feasible, especially when studying large areas. Thus, scientists usually study populations by sampling a representative portion of each habitat and use this sample to make inferences about the population as a whole. The methods used to ...
... However, this method is usually not logistically or economically feasible, especially when studying large areas. Thus, scientists usually study populations by sampling a representative portion of each habitat and use this sample to make inferences about the population as a whole. The methods used to ...
Cervid Ecological Framework
... address cervid management at the broad landscape level. It consolidates and integrates Ontario’s approach to managing cervid species in relation to each other with consideration of the broader ecosystem(s) they share. This Framework is an important step in Ontario’s progress toward the management of ...
... address cervid management at the broad landscape level. It consolidates and integrates Ontario’s approach to managing cervid species in relation to each other with consideration of the broader ecosystem(s) they share. This Framework is an important step in Ontario’s progress toward the management of ...
conceptual synthesis in community ecology
... The perspective that synthesis in community ecology can be achieved by organizing processes into the four categories of selection, drift, speciation, and dispersal, flows directly out of a sequence of conceptual developments in community ecology over the last half century. In the 1950s and 60s, G. E ...
... The perspective that synthesis in community ecology can be achieved by organizing processes into the four categories of selection, drift, speciation, and dispersal, flows directly out of a sequence of conceptual developments in community ecology over the last half century. In the 1950s and 60s, G. E ...
Arion vulgaris - the aetiology of an invasive species
... (WIKTOR 2004). Mating occurs when slugs are in the male phase, from July to October, and copulation is a very complex process that can last as long as 4-5 h (KOZŁOWSKI 2007, ROTH et al. 2012, DREIJERS et al. 2013). Slugs begin to lay eggs after maturing to the non-mating female phase (two to four we ...
... (WIKTOR 2004). Mating occurs when slugs are in the male phase, from July to October, and copulation is a very complex process that can last as long as 4-5 h (KOZŁOWSKI 2007, ROTH et al. 2012, DREIJERS et al. 2013). Slugs begin to lay eggs after maturing to the non-mating female phase (two to four we ...
Source - Wilmington College
... was adjusted to account for these differences. In fact, in our study A. virginiana was negatively affected by any treatment solution compared to the control, as evidenced by its overall low germination percentage across all treatments, suggesting that conditions in extracts were different enough fro ...
... was adjusted to account for these differences. In fact, in our study A. virginiana was negatively affected by any treatment solution compared to the control, as evidenced by its overall low germination percentage across all treatments, suggesting that conditions in extracts were different enough fro ...
Fact Sheet No.15: Tunicate
... General Impacts: Very few species will settle on living colonies of Tunicates. The inability of other species to settle on Tunicate colonies reduces the available space for other fouling species, both native and introduced. Tunicates have short range larval dispersal that allows them to build up abu ...
... General Impacts: Very few species will settle on living colonies of Tunicates. The inability of other species to settle on Tunicate colonies reduces the available space for other fouling species, both native and introduced. Tunicates have short range larval dispersal that allows them to build up abu ...
A review of the indicators for ecosystem structure and functioning
... population (incidence of disease, condition etc.) or the population status of individual species or stocks. For indicators that describe the population status of individual species or stocks it is relevant to distinguish between indicators based on input- or output data from the assessment process w ...
... population (incidence of disease, condition etc.) or the population status of individual species or stocks. For indicators that describe the population status of individual species or stocks it is relevant to distinguish between indicators based on input- or output data from the assessment process w ...
Course notes (part 1)
... These course notes comprise detailed teaching materials to support delivery of each of the ten Ecosystem Approach to Fisheries Management (EAFM) course units outlined in the curriculum and unit plans document. The course notes are also designed to be provided to students as essentail course reading ...
... These course notes comprise detailed teaching materials to support delivery of each of the ten Ecosystem Approach to Fisheries Management (EAFM) course units outlined in the curriculum and unit plans document. The course notes are also designed to be provided to students as essentail course reading ...
Effects of stocking-up freshwater food webs
... Stocking can cause the loss of genetic variation within species, as well as changes in populations and community structure [6,7]. Few studies have quantified the impacts of stocking on food-web or ecosystem function, but those that do often find pervasive and strong effects [8,9]. For example, casca ...
... Stocking can cause the loss of genetic variation within species, as well as changes in populations and community structure [6,7]. Few studies have quantified the impacts of stocking on food-web or ecosystem function, but those that do often find pervasive and strong effects [8,9]. For example, casca ...
station #1 - Scioly.org
... 1. Provide the common name for INVASIVE SPECIES #14 that caused the damage shown in the image. [1] 2. Provide the common name for INVASIVE SPECIES #15 that caused the damage shown in the image. [1] 3. In direct response to INVASIVE SPECIES #15, New York State recently updated its regulations to resp ...
... 1. Provide the common name for INVASIVE SPECIES #14 that caused the damage shown in the image. [1] 2. Provide the common name for INVASIVE SPECIES #15 that caused the damage shown in the image. [1] 3. In direct response to INVASIVE SPECIES #15, New York State recently updated its regulations to resp ...
comparing marine and terrestrial ecosystems
... less important for many marine organisms, although mobile benthic species may be more sensitive to habitat fragmentation (e.g., Acosta 1999). Even marine mammals and, to a lesser extent, birds, tend to be more mobile than their terrestrial counterparts (e.g., interpolar migrations of Arctic Terns an ...
... less important for many marine organisms, although mobile benthic species may be more sensitive to habitat fragmentation (e.g., Acosta 1999). Even marine mammals and, to a lesser extent, birds, tend to be more mobile than their terrestrial counterparts (e.g., interpolar migrations of Arctic Terns an ...
Joint action plan to increase the English hen harrier population
... Since then the population has seen some recovery spreading from the northern isles throughout Scotland. However, with the exception of a handful of birds, southerly range expansion has halted upon reaching the grouse-moors of northern England. The hen harrier has never re-established itself in the u ...
... Since then the population has seen some recovery spreading from the northern isles throughout Scotland. However, with the exception of a handful of birds, southerly range expansion has halted upon reaching the grouse-moors of northern England. The hen harrier has never re-established itself in the u ...
... home to a historically depauperate and highly endemic fish fauna, have been particularly affected by anthropogenic disturbances (Minckley & Deacon 1968), due in part to the region’s arid climate and rapidly expanding human population. While degradation of the physical environment is often argued to ...
Biodiversity action plan
This article is about a conservation biology topic. For other uses of BAP, see BAP (disambiguation).A biodiversity action plan (BAP) is an internationally recognized program addressing threatened species and habitats and is designed to protect and restore biological systems. The original impetus for these plans derives from the 1992 Convention on Biological Diversity (CBD). As of 2009, 191 countries have ratified the CBD, but only a fraction of these have developed substantive BAP documents.The principal elements of a BAP typically include: (a) preparing inventories of biological information for selected species or habitats; (b) assessing the conservation status of species within specified ecosystems; (c) creation of targets for conservation and restoration; and (d) establishing budgets, timelines and institutional partnerships for implementing the BAP.