Here are some excerpts from various reports and articles of
... occurrence of harmful blooms (ref)...further experimental study and fieldwork is urgently required. Folke et al assert that, as a link between nutrient ratios and harmful blooms has not been disproved, the precautionary principle should be invoked. This would involve a moratorium on future expansion ...
... occurrence of harmful blooms (ref)...further experimental study and fieldwork is urgently required. Folke et al assert that, as a link between nutrient ratios and harmful blooms has not been disproved, the precautionary principle should be invoked. This would involve a moratorium on future expansion ...
Chap 35 PP
... • The competitive exclusion principle states that when two populations compete for the same limited, vital resource, one always outcompetes the other and thus brings about the latter’s local extinction. ...
... • The competitive exclusion principle states that when two populations compete for the same limited, vital resource, one always outcompetes the other and thus brings about the latter’s local extinction. ...
A Review of Endemic Species in the Eastern Arc Afromontane Region
... likely to be adversely affected by habitat disturbance. It is hypothesized that organisms that evolved in an unstable area are more robust, in that they are more adaptable to a changing environment (Danielsen, 1997). Most (over 60%) endemic birds live in areas above 1,200 m altitude, and they do not ...
... likely to be adversely affected by habitat disturbance. It is hypothesized that organisms that evolved in an unstable area are more robust, in that they are more adaptable to a changing environment (Danielsen, 1997). Most (over 60%) endemic birds live in areas above 1,200 m altitude, and they do not ...
Lowland subtropical rainforest
... How to tackle weeds Constant vigilance and an ongoing maintenance program is crucial to weed control. As part of long-term management plans, key problem species must be eliminated, natural regeneration promoted and in some cases local native species reintroduced. Livestock and pest animal issues Tra ...
... How to tackle weeds Constant vigilance and an ongoing maintenance program is crucial to weed control. As part of long-term management plans, key problem species must be eliminated, natural regeneration promoted and in some cases local native species reintroduced. Livestock and pest animal issues Tra ...
ES9
... for permission for releases of Achatinella mustelina populations brought in to the rotation system trial in 2013. In the past the main role of this facility has been on tree snail populations that were experiencing steep declines due usually to sudden increases in predation pressure, usually due to ...
... for permission for releases of Achatinella mustelina populations brought in to the rotation system trial in 2013. In the past the main role of this facility has been on tree snail populations that were experiencing steep declines due usually to sudden increases in predation pressure, usually due to ...
Chapter 268 - Captive Breeding and Reintroduction
... population size (the number of individuals that the population needs to grow to achieve its genetic goals). Planning to retain a higher proportion of genetic variation usually increases the target population size. Increasing the number of founders reduces the size of the target population needed to ...
... population size (the number of individuals that the population needs to grow to achieve its genetic goals). Planning to retain a higher proportion of genetic variation usually increases the target population size. Increasing the number of founders reduces the size of the target population needed to ...
Characterization of topological keystone species Local, global and
... trophic relationships with a particular species. However, node degree represents the most local index characterizing the centrality of a node in a network which excludes the longrange interactions arising in the network (Jordán et al., 2006). These indirect effects have been recognized as relevant ...
... trophic relationships with a particular species. However, node degree represents the most local index characterizing the centrality of a node in a network which excludes the longrange interactions arising in the network (Jordán et al., 2006). These indirect effects have been recognized as relevant ...
What is Biodiversity?
... Vegetation: A general term for the plant life of a region, it refers to the ground cover provided by plants. It is affected by environmental factors such as terrain and human factors such as deforestation. Convention on Biological Diversity: A legally binding international treaty adopted in Rio de J ...
... Vegetation: A general term for the plant life of a region, it refers to the ground cover provided by plants. It is affected by environmental factors such as terrain and human factors such as deforestation. Convention on Biological Diversity: A legally binding international treaty adopted in Rio de J ...
Competencies for Species Survey: Reptiles
... unsympathetic management and other reasons. The adder is possibly of most serious concern, with many field workers reporting year-on-year declines. Disturbance is often cited as a factor, but habitat loss, fragmentation and adverse management techniques such as controlled burning and heavy grazing a ...
... unsympathetic management and other reasons. The adder is possibly of most serious concern, with many field workers reporting year-on-year declines. Disturbance is often cited as a factor, but habitat loss, fragmentation and adverse management techniques such as controlled burning and heavy grazing a ...
Elmqvist
... et al. 2003) and contribute to the creation of compounded perturbations (Paine et al. Figure 1. Shifts in coral reef and rangeland ecosystems from a more to a less desir1998). Sustaining desirable states of an able state as a consequence of human-induced erosion of resilience. The stability ecosyste ...
... et al. 2003) and contribute to the creation of compounded perturbations (Paine et al. Figure 1. Shifts in coral reef and rangeland ecosystems from a more to a less desir1998). Sustaining desirable states of an able state as a consequence of human-induced erosion of resilience. The stability ecosyste ...
Species-Area Relationship for Stream Fishes
... a stream may be viewed conceptually as an archipelago, albeit with two important differences from true islands. First, single patches of habitat are generally too small to support self-sustaining populations of fish. In this regard, stream habitats are analogous to small woodlots for bird population ...
... a stream may be viewed conceptually as an archipelago, albeit with two important differences from true islands. First, single patches of habitat are generally too small to support self-sustaining populations of fish. In this regard, stream habitats are analogous to small woodlots for bird population ...
NSF Forms - University of Florida
... any inequities based on gender, race, ethnicity, or disability of its proposed PIs/PDs. To gather information needed for this important task, the proposer should submit a single copy of this form for each identified PI/PD with each proposal. Submission of the requested information is voluntary and w ...
... any inequities based on gender, race, ethnicity, or disability of its proposed PIs/PDs. To gather information needed for this important task, the proposer should submit a single copy of this form for each identified PI/PD with each proposal. Submission of the requested information is voluntary and w ...
Finding solutions for bird restoration and livestock management
... to support management recommendations for complete cattle exclusion to restore this habitat type and its associated avian communities. What these management recommendations do not address, however, is the potential negative effects of complete cattle removal (such as the rapid invasion of weedy plan ...
... to support management recommendations for complete cattle exclusion to restore this habitat type and its associated avian communities. What these management recommendations do not address, however, is the potential negative effects of complete cattle removal (such as the rapid invasion of weedy plan ...
Ecological Importance of Large Herbivores in the
... (Keesing, 1998). By the sixth year of the experiment, grass density was 28% greater in cattle exclusion plots than in plots with cattle, while forb density was 8% greater in plots from which only megaherbivores had been excluded (this latter change is attributable to elephants since giraffes do not ...
... (Keesing, 1998). By the sixth year of the experiment, grass density was 28% greater in cattle exclusion plots than in plots with cattle, while forb density was 8% greater in plots from which only megaherbivores had been excluded (this latter change is attributable to elephants since giraffes do not ...
Loss of mammalian species from the South American Gran Chaco
... mammals found there. 2. We assess the potential consequences of the loss of large and medium-sized native mammalian herbivores and frugivores on Chacoan ecosystem functioning, focusing on their role and conservation status in the Argentine Chaco. 3. Our review shows that almost 50% of the largest fr ...
... mammals found there. 2. We assess the potential consequences of the loss of large and medium-sized native mammalian herbivores and frugivores on Chacoan ecosystem functioning, focusing on their role and conservation status in the Argentine Chaco. 3. Our review shows that almost 50% of the largest fr ...
Notes on the ecology of Tradescantia fluminensis and a biological
... A number of regional councils distribute factsheets describing the threat of tradescantia and methods for its management. Manual weed removal is considered to be a suitable tactic for the control of small infestations because it has least impact on non-target plants growing near or amongst the weed. ...
... A number of regional councils distribute factsheets describing the threat of tradescantia and methods for its management. Manual weed removal is considered to be a suitable tactic for the control of small infestations because it has least impact on non-target plants growing near or amongst the weed. ...
bivalve aquaculture and exotic species: a review of ecological
... former mussel beds into oyster reefs. However, some of these observed changes might be facilitated by factors other than competitive exclusion such as milder winters recently experienced in the German Wadden Sea (Nehls et al. 2006). Although often understandable in hindsight, the influence of exotic ...
... former mussel beds into oyster reefs. However, some of these observed changes might be facilitated by factors other than competitive exclusion such as milder winters recently experienced in the German Wadden Sea (Nehls et al. 2006). Although often understandable in hindsight, the influence of exotic ...
10/19/06 version
... Whittaker and Austin ..................................................................................................................... 7 Hubbell and chance ........................................................................................................................ 8 ...
... Whittaker and Austin ..................................................................................................................... 7 Hubbell and chance ........................................................................................................................ 8 ...
Phytosociological Studies on the Vegetation at Kui Block Field
... mainly Hydl-angea petiola7-is and Trachelospe7~mum asiaticum; both of them are lianas. In the moss layer, Hypnum pulmaeforme, Thuidium kanedae, Plagiothecium nemolal~e and Isothecium subdiverstforme are constant on the boulders. This community may be further subdivided into two groups and four subgr ...
... mainly Hydl-angea petiola7-is and Trachelospe7~mum asiaticum; both of them are lianas. In the moss layer, Hypnum pulmaeforme, Thuidium kanedae, Plagiothecium nemolal~e and Isothecium subdiverstforme are constant on the boulders. This community may be further subdivided into two groups and four subgr ...
poster michael humboldt nuevo logo
... The hake size structure was based on the population size structure estimated from the length frequencies recorded at each trawl station. The length frequency sample of each trawl was weighted to the total hake catch of the trawl, to the stratum, to the sub-area and finally to the total covered area ...
... The hake size structure was based on the population size structure estimated from the length frequencies recorded at each trawl station. The length frequency sample of each trawl was weighted to the total hake catch of the trawl, to the stratum, to the sub-area and finally to the total covered area ...
The diversity and distribution of diatoms: from cosmopolitanism to
... other sub-Antarctic islands. Although based on a more limited number of samples, similar restricted distribution patterns appear to be present in the genera Actinella (Sabbe et al. 2000, 2001) and Muelleria (Spaulding et al. 1999), and possibly also Biremis (Vyverman et al. 1997), Fragilariforma (Ki ...
... other sub-Antarctic islands. Although based on a more limited number of samples, similar restricted distribution patterns appear to be present in the genera Actinella (Sabbe et al. 2000, 2001) and Muelleria (Spaulding et al. 1999), and possibly also Biremis (Vyverman et al. 1997), Fragilariforma (Ki ...
Nevada Wildlife Action Plan - Nevada Department of Wildlife
... and ultimate extinction. When these relict mammal populations blink out, often associated with anthropogenic effects, it is difficult if not impossible for other populations to re-colonize, increasing fragmentation even further and increasing vulnerability until eventual extinction occurs. Indeed, m ...
... and ultimate extinction. When these relict mammal populations blink out, often associated with anthropogenic effects, it is difficult if not impossible for other populations to re-colonize, increasing fragmentation even further and increasing vulnerability until eventual extinction occurs. Indeed, m ...
Keystone Species - Ask A Biologist
... surface of the meadow for the very first time. First there is one litter, and then three weeks later another litter of babies comes up, and three weeks later another litter of babies comes up. And they don't disperse. They stay right on the family territory with the adults, the male and female, thei ...
... surface of the meadow for the very first time. First there is one litter, and then three weeks later another litter of babies comes up, and three weeks later another litter of babies comes up. And they don't disperse. They stay right on the family territory with the adults, the male and female, thei ...
Extreme life history plasticity and the evolution
... America (Fisher and Cover 2007). It is very opportunistic and inhabits a variety of nesting sites, both natural and man-made and in urban areas it is classified a pest species (Thompson 1990). Preliminary observations indicated that in its natural habitat, T. sessile is an inconspicuous species comp ...
... America (Fisher and Cover 2007). It is very opportunistic and inhabits a variety of nesting sites, both natural and man-made and in urban areas it is classified a pest species (Thompson 1990). Preliminary observations indicated that in its natural habitat, T. sessile is an inconspicuous species comp ...
Genetic diversity
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
... Copyright © 2008 Pearson Education, Inc., publishing as Pearson Benjamin Cummings ...
Island restoration
The ecological restoration of islands, or island restoration, is the application of the principles of ecological restoration to islands and island groups. Islands, due to their isolation, are home to many of the world's endemic species, as well as important breeding grounds for seabirds and some marine mammals. Their ecosystems are also very vulnerable to human disturbance and particularly to introduced species, due to their small size. Island groups such as New Zealand and Hawaii have undergone substantial extinctions and losses of habitat. Since the 1950s several organisations and government agencies around the world have worked to restore islands to their original states; New Zealand has used them to hold natural populations of species that would otherwise be unable to survive in the wild. The principal components of island restoration are the removal of introduced species and the reintroduction of native species.