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... c. Chemicals can undergo biological magnification and become highly concentrated in certain organisms. d. All pollutants are chemicals that can never be broken down, so they accumulate in ecosystems. ANS: C ...
... c. Chemicals can undergo biological magnification and become highly concentrated in certain organisms. d. All pollutants are chemicals that can never be broken down, so they accumulate in ecosystems. ANS: C ...
... 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 ...
plant species diversity in natural and managed forests of the pacific
... slash burning. Populations of most vascular plant species recover to original levels prior to canopy closure. However, diversity may remain depressed for more than two decades on severely burned sites, and some species may experience local extinction. Evidence of the effects of post-harvest practice ...
... slash burning. Populations of most vascular plant species recover to original levels prior to canopy closure. However, diversity may remain depressed for more than two decades on severely burned sites, and some species may experience local extinction. Evidence of the effects of post-harvest practice ...
1 - Biology Department | UNC Chapel Hill
... Alpha-niche Differentiation .................................................................................................................. 5 1.1 Resources (type of resource and time of availability) ........................................................... 5 ...
... Alpha-niche Differentiation .................................................................................................................. 5 1.1 Resources (type of resource and time of availability) ........................................................... 5 ...
ILO/Study Guide for Unit 1
... Define and understand the pyramid of numbers Define pyramid of biomass and explain how energy available affects the total mass of organisms in an ecosystem ...
... Define and understand the pyramid of numbers Define pyramid of biomass and explain how energy available affects the total mass of organisms in an ecosystem ...
species richness, latitude, and scale-sensitivity
... such variation are critical steps in the design of global conservation strategies and the implementation of regional management plans. The mid-1950s to early 1960s saw the emergence of rigorous quantification of broad-scale relationships between species richness and latitude (e.g., Fischer 1960). Wi ...
... such variation are critical steps in the design of global conservation strategies and the implementation of regional management plans. The mid-1950s to early 1960s saw the emergence of rigorous quantification of broad-scale relationships between species richness and latitude (e.g., Fischer 1960). Wi ...
Caretta caretta (North West Indian Ocean
... generations ago (~135 yrs) are necessary to estimate population declines beginning three generations ago up to the present (i.e., assessment) year. The challenges of this requirement on long-lived species like turtles—with generation lengths of 30 years or more—are obvious (see Seminoff and Shanker ...
... generations ago (~135 yrs) are necessary to estimate population declines beginning three generations ago up to the present (i.e., assessment) year. The challenges of this requirement on long-lived species like turtles—with generation lengths of 30 years or more—are obvious (see Seminoff and Shanker ...
Viewing invasive species removal in a whole
... invader can lead to increased impacts of another invader; for example, when removal of exotic prey leads to increased predation on native prey by exotic predators10. Finally, removal of invasive plant species can reduce habitat or resources available for native fauna if the removal is not accompanie ...
... invader can lead to increased impacts of another invader; for example, when removal of exotic prey leads to increased predation on native prey by exotic predators10. Finally, removal of invasive plant species can reduce habitat or resources available for native fauna if the removal is not accompanie ...
Convergence in Morphological Patterns and Community
... out paired t-tests for each species because no species occurred in more than two regions. Because slight morphological differences may exist even where differences do not appear significant, we carried out our B-D analyses on both pooled assemblages (using means for specimens from all geographic reg ...
... out paired t-tests for each species because no species occurred in more than two regions. Because slight morphological differences may exist even where differences do not appear significant, we carried out our B-D analyses on both pooled assemblages (using means for specimens from all geographic reg ...
Southern Yorke Peninsula CAP Summary
... Participants of the Southern Yorke Peninsula Conservation Action Planning (CAP) process for technical input and provision of local knowledge (refer Appendix 4). Cover photographs provided by Matt Turner, Todd Berkinshaw and Anne Williams This document may be cited as: Berkinshaw, T.D., Durant, M., K ...
... Participants of the Southern Yorke Peninsula Conservation Action Planning (CAP) process for technical input and provision of local knowledge (refer Appendix 4). Cover photographs provided by Matt Turner, Todd Berkinshaw and Anne Williams This document may be cited as: Berkinshaw, T.D., Durant, M., K ...
plant element occurrence external field form data dictionary
... Ownership: This field is used for information about the owner such as their name, address, phone number, contacts other than owners, information about the owner (they have a big dog, they like us, etc.) used in conjunction with the reference. Anytime the observer provides the BLM as the owner it is ...
... Ownership: This field is used for information about the owner such as their name, address, phone number, contacts other than owners, information about the owner (they have a big dog, they like us, etc.) used in conjunction with the reference. Anytime the observer provides the BLM as the owner it is ...
Species Profile - Atlantic States Marine Fisheries Commission
... historical landings back to 1887, although the fisheries that Amendment also calls for increased reporting and monitoring target river herring date back to colonial times. The quality of requirements for fishermen and dealers. At its June meeting, the data has improved as reporting requirements have ...
... historical landings back to 1887, although the fisheries that Amendment also calls for increased reporting and monitoring target river herring date back to colonial times. The quality of requirements for fishermen and dealers. At its June meeting, the data has improved as reporting requirements have ...
The functional role of biodiversity in ecosystems
... extirpation of numerous other species that depend on kelp for habitat, as well as increased coastal erosion and storm damage since kelp was a primary buffer from wave action. Similar cascading effects of predator removal have ...
... extirpation of numerous other species that depend on kelp for habitat, as well as increased coastal erosion and storm damage since kelp was a primary buffer from wave action. Similar cascading effects of predator removal have ...
THE IVORY ISSUE: quick and easy questions and answers
... The most immediate solution to human-wildlife conflicts is the provision of compensation to the herder/farmer. However, government efforts to provide compensation have historically been problematic. In India, government compensation is much lower than the full market value of the animal killed, and ...
... The most immediate solution to human-wildlife conflicts is the provision of compensation to the herder/farmer. However, government efforts to provide compensation have historically been problematic. In India, government compensation is much lower than the full market value of the animal killed, and ...
Factors Determining Forest Diversity and Biomass on a Tropical
... of the area sampled. To avoid this possible artifact, more spatially explicit sampling across a variety of scales is required [19]. More studies are also required that attempt to link the elevational patterns of compositional change to the factors that might induce these patterns [14]. The relations ...
... of the area sampled. To avoid this possible artifact, more spatially explicit sampling across a variety of scales is required [19]. More studies are also required that attempt to link the elevational patterns of compositional change to the factors that might induce these patterns [14]. The relations ...
Importance of large carnivores for species diversity and top down
... upper trophic levels as well as producers and decomposers at lower trophic levels. Also, interspecific competition does occur in those trophic levels. In turn, density independent processes like predation are limiting herbivores in the middle level. Following this, herbivores do not compete for food ...
... upper trophic levels as well as producers and decomposers at lower trophic levels. Also, interspecific competition does occur in those trophic levels. In turn, density independent processes like predation are limiting herbivores in the middle level. Following this, herbivores do not compete for food ...
i.e. Mayfield and Levine 2010
... the determinants of coexistence could be explicitly decomposed into niche and competitive ability differences. In the absence of niche differences, the species that is the best competitor, on average, displaces the others. ChessonÕs framework for niche and competitive ability differences is most use ...
... the determinants of coexistence could be explicitly decomposed into niche and competitive ability differences. In the absence of niche differences, the species that is the best competitor, on average, displaces the others. ChessonÕs framework for niche and competitive ability differences is most use ...
Paxton Lake Benthic and Limnetic Stickleback (Gasterosteus
... environmental perturbation. Whereas population modelling indicates the sticklebacks are resilient to environmental perturbations, other observations indicate that continued reproductive isolation depends on environmental factors (water clarity, aquatic plant density, habitat complexity), which to da ...
... environmental perturbation. Whereas population modelling indicates the sticklebacks are resilient to environmental perturbations, other observations indicate that continued reproductive isolation depends on environmental factors (water clarity, aquatic plant density, habitat complexity), which to da ...
Eutrophication causes speciation reversal in whitefish adaptive
... radiations, the magnitude of eutrophication explains the pattern of species loss and levels of genetic and functional distinctiveness among remaining species. We argue that extinction by speciation reversal may be more widespread than currently appreciated. Preventing such extinctions will require t ...
... radiations, the magnitude of eutrophication explains the pattern of species loss and levels of genetic and functional distinctiveness among remaining species. We argue that extinction by speciation reversal may be more widespread than currently appreciated. Preventing such extinctions will require t ...
Native Fauna on Exotic Trees: Phylogenetic
... (Lawton and Schröder 1977; Conner et al. 1980; Neuvonen and Niemelä 1981; Kennedy and Southwood 1984; Brändle and Brandl 2001) or effect sizes were quite low (Roques et al. 2006). Winter (1974) even showed that, at least in some cases, colonization from the distantly related surrounding herb and ...
... (Lawton and Schröder 1977; Conner et al. 1980; Neuvonen and Niemelä 1981; Kennedy and Southwood 1984; Brändle and Brandl 2001) or effect sizes were quite low (Roques et al. 2006). Winter (1974) even showed that, at least in some cases, colonization from the distantly related surrounding herb and ...
Using species distribution and occupancy modeling to guide survey
... of species, but identification of critical habitat remains a challenge. Species distribution modeling and occupancy modeling are both approaches that have been used to predict species distributions and can identify critical habitat characteristics associated with species occurrence. Additionally, occ ...
... of species, but identification of critical habitat remains a challenge. Species distribution modeling and occupancy modeling are both approaches that have been used to predict species distributions and can identify critical habitat characteristics associated with species occurrence. Additionally, occ ...
Lepomis cyanellus (Rafinesque, 1819)
... Lepomis macrochirus is known to be invasive in Japan, Korea (Kawamura et al., 2006), South Africa (Wellcome, 1988) and some states of the USA (CABI, 2013). In these areas it can overcrowd and stunt the growth of other fish, including native sunfish species, by competing for food and habitat. It may ...
... Lepomis macrochirus is known to be invasive in Japan, Korea (Kawamura et al., 2006), South Africa (Wellcome, 1988) and some states of the USA (CABI, 2013). In these areas it can overcrowd and stunt the growth of other fish, including native sunfish species, by competing for food and habitat. It may ...
View plan for Opaelua Lower Management Unit
... Lower I. NRS are therefore developing a methodology that will accurately detect changes in vegetation composition for an MU of this size. Methodology is expected to be developed within the next two years. Weed Control Monitoring The following are weed control objectives/questions which will be monit ...
... Lower I. NRS are therefore developing a methodology that will accurately detect changes in vegetation composition for an MU of this size. Methodology is expected to be developed within the next two years. Weed Control Monitoring The following are weed control objectives/questions which will be monit ...
Ecological and genetic models of diversity
... and a rate of output (extinction). The underpinning of the model is illustrated with a cartoon showing islands of variable size and distance from a mainland, the two key island characteristics assumed to determine rates of extinction and colonization (Fig. 1A). The MacArthur-Wilson model is widely a ...
... and a rate of output (extinction). The underpinning of the model is illustrated with a cartoon showing islands of variable size and distance from a mainland, the two key island characteristics assumed to determine rates of extinction and colonization (Fig. 1A). The MacArthur-Wilson model is widely a ...
saving the flagship species
... borderless. Their ecological status in the web of nature has significant potential to bring multilateral actions for protecting not only the species but also wide habitats for many other species. Thus, addressing challenges in the life of the flagship species requires connecting policies and actions ...
... borderless. Their ecological status in the web of nature has significant potential to bring multilateral actions for protecting not only the species but also wide habitats for many other species. Thus, addressing challenges in the life of the flagship species requires connecting policies and actions ...
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.