Tragedy of the Commons
... -§ 101- suggests environmental considerations but makes none of them mandatory -§ 102c- requires federal agencies to consult with other agencies that have some jurisdiction or special expertise regarding environmental impacts at issue -EIS must be prepared by any agency whose major federal actions s ...
... -§ 101- suggests environmental considerations but makes none of them mandatory -§ 102c- requires federal agencies to consult with other agencies that have some jurisdiction or special expertise regarding environmental impacts at issue -EIS must be prepared by any agency whose major federal actions s ...
Trophic resource partitioning within a shorebird community feeding
... In ecological systems, it is necessary to describe the trophic niches of species and their segregation or overlap to understand the distribution of species in the community. In oceanic systems, the community structure of top predators such as seabird communities has been well documented with many st ...
... In ecological systems, it is necessary to describe the trophic niches of species and their segregation or overlap to understand the distribution of species in the community. In oceanic systems, the community structure of top predators such as seabird communities has been well documented with many st ...
Open or download EMP bulletin as a PDF file
... ost people living on the Hawaiian Islands are aware that we share our home with the highest number of endangered species in the nation. Our native plants and animals, many of which are found nowhere else on Earth, are suffering from threats that are diminishing their numbers at an alarming rate. One ...
... ost people living on the Hawaiian Islands are aware that we share our home with the highest number of endangered species in the nation. Our native plants and animals, many of which are found nowhere else on Earth, are suffering from threats that are diminishing their numbers at an alarming rate. One ...
Biotic Invasions: Causes, Epidemiology Biotic Invasions: Causes
... approach focused on battling individual invaders. • Prevention of invasions is much less costly than post-entry control. Changing national and international quarantine laws by adopting a “guilty until proven innocent” approach, instead of the current strategy of denying entry only to species already ...
... approach focused on battling individual invaders. • Prevention of invasions is much less costly than post-entry control. Changing national and international quarantine laws by adopting a “guilty until proven innocent” approach, instead of the current strategy of denying entry only to species already ...
Deadwood - Buglife
... Introduction Deadwood plays a key role in ecosystem functioning and productivity in terrestrial and riparian habitats. It provides habitat for many species of bryophytes, lichens, fungi, invertebrates, fish, amphibians, reptiles, birds and mammals. Despite this essential role, deadwood has been remo ...
... Introduction Deadwood plays a key role in ecosystem functioning and productivity in terrestrial and riparian habitats. It provides habitat for many species of bryophytes, lichens, fungi, invertebrates, fish, amphibians, reptiles, birds and mammals. Despite this essential role, deadwood has been remo ...
Skabelon
... - An age structured bio-economic model is constructed - Stochasticity in stock-recruitment has been added - Salinity has been added to stock-recruitment model - Lack of data to include ALL species interactions - Predation mortality for cod has been included. - The model is not as flexible as intende ...
... - An age structured bio-economic model is constructed - Stochasticity in stock-recruitment has been added - Salinity has been added to stock-recruitment model - Lack of data to include ALL species interactions - Predation mortality for cod has been included. - The model is not as flexible as intende ...
Lafayette Parish School System 2013
... Unit Description and Student Understandings: In this unit, activities will focus on biomes and their characteristics; distinguishing among ecosystems, communities, populations, species, habitats, and niches; symbiotic relationships; and the impact of population changes on ecosystems. In this unit, a ...
... Unit Description and Student Understandings: In this unit, activities will focus on biomes and their characteristics; distinguishing among ecosystems, communities, populations, species, habitats, and niches; symbiotic relationships; and the impact of population changes on ecosystems. In this unit, a ...
trade-off between competitive ability
... periphyton and detritus (Hargrave 1970, DeMarch 1981), and thus the large and small species examined in this study probably have high overlap in diet composition that is independent of body size. In Hyalella, two size-related behaviors may underlie much of the asymmetry in competitive ability observ ...
... periphyton and detritus (Hargrave 1970, DeMarch 1981), and thus the large and small species examined in this study probably have high overlap in diet composition that is independent of body size. In Hyalella, two size-related behaviors may underlie much of the asymmetry in competitive ability observ ...
ppt
... Now, if we put these isocline together, we can describe the possible outcomes of pairwise competition. The effects are more interesting if the isoclines cross. There is now a point of intersection, where BOTH populations have a nonzero equilibrium. This is competitive coexistence. And it is stable - ...
... Now, if we put these isocline together, we can describe the possible outcomes of pairwise competition. The effects are more interesting if the isoclines cross. There is now a point of intersection, where BOTH populations have a nonzero equilibrium. This is competitive coexistence. And it is stable - ...
Patterns of cooccurrences in a killifish
... Because of their largely indeterminate growth patterns, fishes may be viewed as classic examples of organisms with a wide range of body sizes and associated ecological attributes that emerge through the process of ontogeny (Raffaelli 2007; Masdeu et al. 2011). Different life stages of the same speci ...
... Because of their largely indeterminate growth patterns, fishes may be viewed as classic examples of organisms with a wide range of body sizes and associated ecological attributes that emerge through the process of ontogeny (Raffaelli 2007; Masdeu et al. 2011). Different life stages of the same speci ...
EPILOGUE
... null model is only as good as the data it purports to evaluate. Unfortunately, there seem to be few quality control standards in the discipline. We foresee: an ominous trend in large-scale biogeography due to newly available electronic databases (e.g., US and Canadian Wildlife Service Breeding Bird ...
... null model is only as good as the data it purports to evaluate. Unfortunately, there seem to be few quality control standards in the discipline. We foresee: an ominous trend in large-scale biogeography due to newly available electronic databases (e.g., US and Canadian Wildlife Service Breeding Bird ...
HABIT-CHANGE Priority matrix impacts per region and habitat
... based on a literature review (see Output 3.1.1). They will give a broader overview on the topic and allow for a comparison of the data from investigation areas with information provided on a more general scale. The information on impacts per investigation area in chapter 4 is based on expert knowled ...
... based on a literature review (see Output 3.1.1). They will give a broader overview on the topic and allow for a comparison of the data from investigation areas with information provided on a more general scale. The information on impacts per investigation area in chapter 4 is based on expert knowled ...
Ecological Applications at the Level of Organisms and Single
... produced by the burning of fossil fuels), although mitigation must also focus on the economic and sociopolitical dimensions of the problem. This is discussed in Chapter 22, because the relevant issues relate to ecosystem functioning. However, in the current ...
... produced by the burning of fossil fuels), although mitigation must also focus on the economic and sociopolitical dimensions of the problem. This is discussed in Chapter 22, because the relevant issues relate to ecosystem functioning. However, in the current ...
Slide 1
... Majority involve perennial grasses (13 of 20 = 65%) 4 (20%) involve annual grasses – All are in arid West Other 3 are trees / shrubs (Florida, South Africa) Majority of invaders represent new life form (14 of 20 = 70%) Majority ↑ fire frequency (14; 70%) Only 2 (10%) ↓ frequency Majority ↑ fire size ...
... Majority involve perennial grasses (13 of 20 = 65%) 4 (20%) involve annual grasses – All are in arid West Other 3 are trees / shrubs (Florida, South Africa) Majority of invaders represent new life form (14 of 20 = 70%) Majority ↑ fire frequency (14; 70%) Only 2 (10%) ↓ frequency Majority ↑ fire size ...
Chapter 5
... Core Case Study: Endangered Southern Sea Otter (2) • 1938-2008: increase from 50 to ~2760 • 1977: declared an endangered species • Why should we care? 1. Cute and cuddly – tourists love them 2. Ethics – it’s wrong to hunt a species to extinction 3. Keystone species – eat other species that would de ...
... Core Case Study: Endangered Southern Sea Otter (2) • 1938-2008: increase from 50 to ~2760 • 1977: declared an endangered species • Why should we care? 1. Cute and cuddly – tourists love them 2. Ethics – it’s wrong to hunt a species to extinction 3. Keystone species – eat other species that would de ...
Competition
... As populations grow, they use more resources. Ultimately, resources become limited and individuals in the population must compete with each other to obtain the resources they need to ...
... As populations grow, they use more resources. Ultimately, resources become limited and individuals in the population must compete with each other to obtain the resources they need to ...
Word File - UNESCO World Heritage Centre
... peak of the Botswana’s dry season (June/July). The Okavango Delta World Heritage property displays an extraordinary juxtaposition of a vibrant wetland in an arid landscape and the miraculous transformation of huge sandy, dry and brown depressions by seasonal floods triggers spectacular wildlife disp ...
... peak of the Botswana’s dry season (June/July). The Okavango Delta World Heritage property displays an extraordinary juxtaposition of a vibrant wetland in an arid landscape and the miraculous transformation of huge sandy, dry and brown depressions by seasonal floods triggers spectacular wildlife disp ...
Section 1: Developing a Theory Key Ideas • Why is evolutionary
... In contrast, the number of people was increasing exponentially. More people were added each year than were added the year before. ...
... In contrast, the number of people was increasing exponentially. More people were added each year than were added the year before. ...
Shrublands habitat profile in the NH Wildlife Action Plan
... cable to shrubland habitats (New Hampshire NRCS 2005b). Statistics are currently unavailable to determine how many hectares have been treated with each of these practices. In 2005, New Hampshire received over $1,000,000 for WHIP. Since 1990, the USFWS’ Partners Program has provided technical and fin ...
... cable to shrubland habitats (New Hampshire NRCS 2005b). Statistics are currently unavailable to determine how many hectares have been treated with each of these practices. In 2005, New Hampshire received over $1,000,000 for WHIP. Since 1990, the USFWS’ Partners Program has provided technical and fin ...
biolcons_biodiv_loss - digital
... (see Supplementary material). In this matrix, every bird species could be affected by more than one extinction driver, with mean number of driver categories cited per bird species being 2.9 (±1.3 S.D.). Although the Red List has been criticized in its details, it remains the most complete, updated a ...
... (see Supplementary material). In this matrix, every bird species could be affected by more than one extinction driver, with mean number of driver categories cited per bird species being 2.9 (±1.3 S.D.). Although the Red List has been criticized in its details, it remains the most complete, updated a ...
two degrees of separation in complex food webs
... Feeding relationships can cause invasions, extirpations, and population fluctuations of a species to dramatically affect other species within a variety of natural habitats.1-11 Such strong effects rarely propagate through food webs more than three links away from the initial perturbation.1-4 However ...
... Feeding relationships can cause invasions, extirpations, and population fluctuations of a species to dramatically affect other species within a variety of natural habitats.1-11 Such strong effects rarely propagate through food webs more than three links away from the initial perturbation.1-4 However ...
Biodiversity Conservation, Ecosystem Functioning, and Economic
... trade-offs between biodiversity loss and agricultural intensification (Perfecto et al. 2005; Steffan-Dewenter et al. 2007). Conversely, O’Brien and Kinnaird (2003) and Rappole et al. (2003a, 2003b) suggest that intensification conserves biodiversity by minimizing the demand for natural habitat. Neve ...
... trade-offs between biodiversity loss and agricultural intensification (Perfecto et al. 2005; Steffan-Dewenter et al. 2007). Conversely, O’Brien and Kinnaird (2003) and Rappole et al. (2003a, 2003b) suggest that intensification conserves biodiversity by minimizing the demand for natural habitat. Neve ...
Animal species diversity driven by habitat heterogeneity
... Concerning the species groups studied, more than one-third of all screened papers comprised studies of avian fauna (Fig. 1b). This is noteworthy as birds make up less than half a per cent of global animal species diversity. A study frequency of 22% was found for mammals, including studies on, e.g. ...
... Concerning the species groups studied, more than one-third of all screened papers comprised studies of avian fauna (Fig. 1b). This is noteworthy as birds make up less than half a per cent of global animal species diversity. A study frequency of 22% was found for mammals, including studies on, e.g. ...
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.