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Reading 15 Biodiversity and Ecosystem Functioning: Maintaining
... not limited to increased rates of species extinction, but includes losses in genetic and functional diversity across population, community, ecosystem, landscape, and global scales. The term “biodiversity” refers collectively to all these aspects of biotic diversity. The wide-ranging decline in biodi ...
... not limited to increased rates of species extinction, but includes losses in genetic and functional diversity across population, community, ecosystem, landscape, and global scales. The term “biodiversity” refers collectively to all these aspects of biotic diversity. The wide-ranging decline in biodi ...
The importance of invertebrate biodiversity
... maintaining the integrity of communities by eliminating intruders which would usually arrive in very small numbers compared to the large number of seeds/seedlings produced by the resident plants. In this way, intact native communities can resist invasive weeds, unless the process is disrupted by man ...
... maintaining the integrity of communities by eliminating intruders which would usually arrive in very small numbers compared to the large number of seeds/seedlings produced by the resident plants. In this way, intact native communities can resist invasive weeds, unless the process is disrupted by man ...
3. and savannah ecosystems
... Cape peninsula, and the entire Cape floristic region (including some nonfynbos vegetation) holds some 8,550 species, about 70 per cent of which are endemic. Levels of diversity do not necessarily correspond in other groups: for example, in the Cape Mediterranean-type ecosystem, reptile diversity is ...
... Cape peninsula, and the entire Cape floristic region (including some nonfynbos vegetation) holds some 8,550 species, about 70 per cent of which are endemic. Levels of diversity do not necessarily correspond in other groups: for example, in the Cape Mediterranean-type ecosystem, reptile diversity is ...
Caulerpa taxifolia, a Growing Menace for the Temperate Marine
... Within the Mediterranean basin, article 13 of the Barcelona Convention's Protocol on Specially Protected Areas, which was adopted in 1996, provides legislation regarding the introduction of non-native species like Caulerpa taxifolia. In March 1998, at UNEP's "Workshop on the Caulerpa Species Invasiv ...
... Within the Mediterranean basin, article 13 of the Barcelona Convention's Protocol on Specially Protected Areas, which was adopted in 1996, provides legislation regarding the introduction of non-native species like Caulerpa taxifolia. In March 1998, at UNEP's "Workshop on the Caulerpa Species Invasiv ...
alteration of ecosystem nitrogen dynamics by exotic plants: a case
... thus interact with residents in a competitive manner that would likely result in similar effects on ecosystem processes. We suggest that these species can still cause ecosystem change, but that it will occur much more slowly. To be useful, this simplistic framework must be used in reference to clear ...
... thus interact with residents in a competitive manner that would likely result in similar effects on ecosystem processes. We suggest that these species can still cause ecosystem change, but that it will occur much more slowly. To be useful, this simplistic framework must be used in reference to clear ...
10.1 MB - Charles Darwin Foundation
... Even more drastic damage was done when the newly independent Republic of Ecuador annexed the islands and made repeated efforts to colonize them from 1832 onwards. The islands, so suitable for tortoises, proved ill-adapted to human settlement , whether by Ecuadoreans or Europeans, and after a century ...
... Even more drastic damage was done when the newly independent Republic of Ecuador annexed the islands and made repeated efforts to colonize them from 1832 onwards. The islands, so suitable for tortoises, proved ill-adapted to human settlement , whether by Ecuadoreans or Europeans, and after a century ...
- Wiley Online Library
... plant. If, per gram root, the C costs are the same for fine and coarse roots, then thin roots will be more efficient in nutrient uptake than coarse roots, because of the importance of root length and root surface area in nutrient and water uptake (Yanai et al. 1995). However, the optimal root diamet ...
... plant. If, per gram root, the C costs are the same for fine and coarse roots, then thin roots will be more efficient in nutrient uptake than coarse roots, because of the importance of root length and root surface area in nutrient and water uptake (Yanai et al. 1995). However, the optimal root diamet ...
File - The Eurasian Ruffe
... neuromasts. Neuromasts are organs that allow organisms to exceptionally feel vibrations in the water. This allows the Ruffe to dodge predators and find prey better than other fish. Even worse, the neuromasts in the Eurasian Ruffe advance over time, while other species’ decline over time. This allows ...
... neuromasts. Neuromasts are organs that allow organisms to exceptionally feel vibrations in the water. This allows the Ruffe to dodge predators and find prey better than other fish. Even worse, the neuromasts in the Eurasian Ruffe advance over time, while other species’ decline over time. This allows ...
5.7 Thompson Okanagan Region
... Pressures from Urban Growth and Development There are many pressures on ecosystems that are directly related to urban and rural population expansion in the region. Population growth: The Okanagan area is especially impacted by population growth. Population growth projections for 2001–2031 project ...
... Pressures from Urban Growth and Development There are many pressures on ecosystems that are directly related to urban and rural population expansion in the region. Population growth: The Okanagan area is especially impacted by population growth. Population growth projections for 2001–2031 project ...
Using phylogeographic analyses of gene trees to test species status
... A gene tree is an evolutionary reconstruction of the genealogical history of the genetic variation found in a sample of homologous genes or DNA regions that have experienced little or no recombination. Gene trees have the potential of straddling the interface between intra- and interspecific evoluti ...
... A gene tree is an evolutionary reconstruction of the genealogical history of the genetic variation found in a sample of homologous genes or DNA regions that have experienced little or no recombination. Gene trees have the potential of straddling the interface between intra- and interspecific evoluti ...
assessment
... The Glenelg Freshwater Mussel is a bivalve mollusc that attains 18‑51 mm in length (Playford and Walker 2008). The shell is almond-shaped, and the umbo (beak) and shell surface are sculpted with interlocking V-shaped ridges. The outer periostracum is olive-green in juveniles and dark purple-brown in ...
... The Glenelg Freshwater Mussel is a bivalve mollusc that attains 18‑51 mm in length (Playford and Walker 2008). The shell is almond-shaped, and the umbo (beak) and shell surface are sculpted with interlocking V-shaped ridges. The outer periostracum is olive-green in juveniles and dark purple-brown in ...
1 PETITION TO LIST ONE SPECIES OF HAWAIIAN YELLOW
... There is strong evidence of significant decline of H. facilis. Hylaeus facilis has most certainly been extirpated from the majority of its range (Daly and Magnacca 2003, Magnacca 2007). In the time between final historic collections in the 1930s and recent collections, the species almost entirely d ...
... There is strong evidence of significant decline of H. facilis. Hylaeus facilis has most certainly been extirpated from the majority of its range (Daly and Magnacca 2003, Magnacca 2007). In the time between final historic collections in the 1930s and recent collections, the species almost entirely d ...
roundtable session 2a: national legislation, eu directives and
... provoke biological unbalance - cannot be introduced in the natural environment nor in fish farms or fish enclosures, nor transported live. These measures also apply to a fisherman or crayfish farmer, from the fishing site to the sale or consumption site. Procambarus clarkii’s legal status is somewha ...
... provoke biological unbalance - cannot be introduced in the natural environment nor in fish farms or fish enclosures, nor transported live. These measures also apply to a fisherman or crayfish farmer, from the fishing site to the sale or consumption site. Procambarus clarkii’s legal status is somewha ...
Weighting and indirect effects identify keystone species in food webs
... removing the most-connected nodes does not necessarily identify the most destructive extinction sequence (Allesina & Pascual 2009). There has been a tradition of binary descriptions in many network studies, reflecting the relative ease of data collection, but there is a growing appreciation that thi ...
... removing the most-connected nodes does not necessarily identify the most destructive extinction sequence (Allesina & Pascual 2009). There has been a tradition of binary descriptions in many network studies, reflecting the relative ease of data collection, but there is a growing appreciation that thi ...
Ecological communities in variable environments : dynamics
... In multi-species communities, each species has its specific response to environmental stochasticity. Species-specific environmental responses can be either independent (IR), uniformly correlated (CR), or hierarchically correlated (HR) between species. IR refers to a situation where each species resp ...
... In multi-species communities, each species has its specific response to environmental stochasticity. Species-specific environmental responses can be either independent (IR), uniformly correlated (CR), or hierarchically correlated (HR) between species. IR refers to a situation where each species resp ...
Flora Survey - NT EPA - Northern Territory Government
... A total of 165 plant species were recorded during the field surveys of the Lethbridge and Andranangoo sites. Of these, seven are endemic to the Northern Territory. One listed threatened species, Cycas armstrongii, was recorded from the Andranangoo Prospect. This species is listed as Vulnerable under ...
... A total of 165 plant species were recorded during the field surveys of the Lethbridge and Andranangoo sites. Of these, seven are endemic to the Northern Territory. One listed threatened species, Cycas armstrongii, was recorded from the Andranangoo Prospect. This species is listed as Vulnerable under ...
Conservation Systematics: The Bufo boreas Species Group
... 1992) applies specific ranks to all lineages (e.g., class, order, family, genus, species, and variety) independent of the diversity within or among them. Ranks are an imprecise measure of diversity because they identify only a few categories in a world that can have a near infinite number of hierarc ...
... 1992) applies specific ranks to all lineages (e.g., class, order, family, genus, species, and variety) independent of the diversity within or among them. Ranks are an imprecise measure of diversity because they identify only a few categories in a world that can have a near infinite number of hierarc ...
1 - Biology Department | UNC Chapel Hill
... (Wilson 1999 %130). Lastly, tails: if it is conceivable that the observed data could differ from the ...
... (Wilson 1999 %130). Lastly, tails: if it is conceivable that the observed data could differ from the ...
Limiting similarity, species packing, and the shape of
... in species clustering (Fig. 3f). It has been argued that truncation of the competition kernel is a way to represent a finite niche space (Scheffer and van Nes, 2006; Fort et al., 2009, 2010). Alternatively, and preferably, a finite niche space can be modeled as the tapering off of a resource distributio ...
... in species clustering (Fig. 3f). It has been argued that truncation of the competition kernel is a way to represent a finite niche space (Scheffer and van Nes, 2006; Fort et al., 2009, 2010). Alternatively, and preferably, a finite niche space can be modeled as the tapering off of a resource distributio ...
Impact of argentine ants (Linepithema humile, Mayr) on saproxylic
... Very little ecological work has been done on the saproxylic fauna of the South African forests, apart from some basic ecophysiological studies that focused on the physiological and behavioural adaptations of animals to life in this ‘cryptic’ habitat (Lawrence 1953) and the impact of removing fuelwo ...
... Very little ecological work has been done on the saproxylic fauna of the South African forests, apart from some basic ecophysiological studies that focused on the physiological and behavioural adaptations of animals to life in this ‘cryptic’ habitat (Lawrence 1953) and the impact of removing fuelwo ...
What is Biodiversity
... An estimated 90 percent of owering plants depend on pollinators such as wasps, birds, bats, and bees, to reproduce. ...
... An estimated 90 percent of owering plants depend on pollinators such as wasps, birds, bats, and bees, to reproduce. ...
Effects of phytopathogens on plant community dynamics: a review
... work has been done with tropical trees[75]. This is possibly because sufficient rainfall and suitable ...
... work has been done with tropical trees[75]. This is possibly because sufficient rainfall and suitable ...
Eleutherodactylus Frog Introductions to Hawaii
... Campbell 1996; McKeown 1998), but either vouchered specimens were not provided and identification was unconfirmed (R. Campbell 1996) or claims as to identity and distribution included inaccuracies because they were based on erroneous assumptions and second-hand information from newspaper articles (M ...
... Campbell 1996; McKeown 1998), but either vouchered specimens were not provided and identification was unconfirmed (R. Campbell 1996) or claims as to identity and distribution included inaccuracies because they were based on erroneous assumptions and second-hand information from newspaper articles (M ...
The Weed Impact to Native Species
... people and the workshop participants were asked to bring along any information on species impacted by bitou bush and lists of species they thought might be at risk, irrespective of whether this information was anecdotal, perceived or based on some form of assessment (i.e. observations from invaded a ...
... people and the workshop participants were asked to bring along any information on species impacted by bitou bush and lists of species they thought might be at risk, irrespective of whether this information was anecdotal, perceived or based on some form of assessment (i.e. observations from invaded a ...
Non-random biodiversity loss underlies predictable increases in
... most ubiquitous species on the west coast of North America [57], making it an ideal sentinel host species for comparing B/CYDV prevalence at multiple locations. In addition, B. hordeaceus is an effective sentinel, because it is annual, which means that all infection occurred in the current growing s ...
... most ubiquitous species on the west coast of North America [57], making it an ideal sentinel host species for comparing B/CYDV prevalence at multiple locations. In addition, B. hordeaceus is an effective sentinel, because it is annual, which means that all infection occurred in the current growing s ...
Introduced species
![](https://commons.wikimedia.org/wiki/Special:FilePath/Melilotus_alba_bgiu.jpg?width=300)
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.