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Diversity effects on production in different light and fertility
... was performed using only the SS for species composition and including species presence-absence (dummy variables) and richness terms in separate models. In this way, the significance of species richness as a determinant of production could be assessed against both compositional variation and the full ...
... was performed using only the SS for species composition and including species presence-absence (dummy variables) and richness terms in separate models. In this way, the significance of species richness as a determinant of production could be assessed against both compositional variation and the full ...
Impact of Argentine ants (Linepithema humile) on an arboreal ant
... closely correlated with richness of arthropods (Southwood et al. 1982; Basset and Kitching 1991; Majer and Delabie 1999). We found that ant species richness depended on tree size, hence, when a tree was large enough, as many as four different native species were found together (Table 4). Relationshi ...
... closely correlated with richness of arthropods (Southwood et al. 1982; Basset and Kitching 1991; Majer and Delabie 1999). We found that ant species richness depended on tree size, hence, when a tree was large enough, as many as four different native species were found together (Table 4). Relationshi ...
... understanding of the importance of their function and position in their habitats. Thus, it is surprising that these aspects have not been studied in many species yet. Particularly, worldwide fishes have been the most studied group of vertebrates with different kinds of scientific approaches, as aqua ...
AIM: Populations and Ecosystems Ideas
... This is called a mutually beneficial relationship. In some interactions, one organism will benefit by interacting and is more likely to survive and reproduce while the other is harmed and its survival and/or reproduction may be limited. o Parasites are organisms that live on or in other organisms ...
... This is called a mutually beneficial relationship. In some interactions, one organism will benefit by interacting and is more likely to survive and reproduce while the other is harmed and its survival and/or reproduction may be limited. o Parasites are organisms that live on or in other organisms ...
VonHolle_Simberloff_2005 - UCF College of Sciences
... Ecological resistance.—We compared the influence of abiotic, biotic, and propagule pressure variables on the invasion success of transplanted invaders by plant origin (native, nonnative). We performed multiple regressions of percentage survival of invaders by origin (native, nonnative) within each p ...
... Ecological resistance.—We compared the influence of abiotic, biotic, and propagule pressure variables on the invasion success of transplanted invaders by plant origin (native, nonnative). We performed multiple regressions of percentage survival of invaders by origin (native, nonnative) within each p ...
A weed risk assessment system for new conservation weeds in New
... open habitats unsuitable for frugivorous birds, and a scoring system for that habitat type might give bird dispersal a lower score. Even so, many naturalised species have abundant wind-blown seeds, but only a few are considered to be conservation weeds. Thus, attributes such as dispersal mode may be ...
... open habitats unsuitable for frugivorous birds, and a scoring system for that habitat type might give bird dispersal a lower score. Even so, many naturalised species have abundant wind-blown seeds, but only a few are considered to be conservation weeds. Thus, attributes such as dispersal mode may be ...
Pigs - Molonglo Catchment Group
... A long time local from the Burra creek area within the Molonglo catchment has been struggling with wild pigs on his property for some years now. In their search for food, the pigs will often root around in the soil, “sometimes it’s so bad it looks like a rotary hoe has been through the place, they c ...
... A long time local from the Burra creek area within the Molonglo catchment has been struggling with wild pigs on his property for some years now. In their search for food, the pigs will often root around in the soil, “sometimes it’s so bad it looks like a rotary hoe has been through the place, they c ...
Preview - Magnolia press
... known species. Three of these genera, Syndesus MacLeay (Syndesinae), Ceratognathus Westwood (Aesalinae: Ceratognathini), and Lamprima Latreille (Lampriminae: Lamprimini) comprise alate species, which are widely distributed across much of Australasia. However, the other two genera, Hoplogonus Parry ...
... known species. Three of these genera, Syndesus MacLeay (Syndesinae), Ceratognathus Westwood (Aesalinae: Ceratognathini), and Lamprima Latreille (Lampriminae: Lamprimini) comprise alate species, which are widely distributed across much of Australasia. However, the other two genera, Hoplogonus Parry ...
rainforest restoration - Ministry of Environment and Forests
... tropical rainforest may hold from 100 to over 300 species of trees. The canopy reaches an average height of 25 metres or more, with some emergent trees reaching up to 80 metres in height, towering over the others. The tree canopy is dense, allowing less than 10% of the sunlight to reach the forest f ...
... tropical rainforest may hold from 100 to over 300 species of trees. The canopy reaches an average height of 25 metres or more, with some emergent trees reaching up to 80 metres in height, towering over the others. The tree canopy is dense, allowing less than 10% of the sunlight to reach the forest f ...
Patterns in species richness
... • Fig. 20.21 Patterns in taxon richness through the fossil record. ...
... • Fig. 20.21 Patterns in taxon richness through the fossil record. ...
Nullarbor 2 (NUL2 Nullarbor Central Band subregion)45.8 KB
... Caves of the Nullarbor Plains are considered to be of World importance. Nullarbor Bioregion has been considered for nomination as a World Heritage site, indicating its significance and uniqueness. Therefore, research and prudent management are particularly important in this subregion. ...
... Caves of the Nullarbor Plains are considered to be of World importance. Nullarbor Bioregion has been considered for nomination as a World Heritage site, indicating its significance and uniqueness. Therefore, research and prudent management are particularly important in this subregion. ...
Status of the World`s Tortoises and Freshwater Turtles
... efforts; 3) networking among Asian Batagur conservation practitioners to share successes, avoid earlier mistakes, and coordinate activities. Red-crowned River Turtle, Batagur kachuga – India – CR Historically, Batagur kachuga (previously known as Kachuga kachuga) was widespread in the main riverine ...
... efforts; 3) networking among Asian Batagur conservation practitioners to share successes, avoid earlier mistakes, and coordinate activities. Red-crowned River Turtle, Batagur kachuga – India – CR Historically, Batagur kachuga (previously known as Kachuga kachuga) was widespread in the main riverine ...
Final Report - Rufford Small Grants
... The endangered native minnows occur mostly within the headwater streams of the Study Rivers. Presently, there are no barriers to the upstream movement and potential invasion of these headwater streams. The next step therefore requires a proper management plan to protect these headwaters habitats. Co ...
... The endangered native minnows occur mostly within the headwater streams of the Study Rivers. Presently, there are no barriers to the upstream movement and potential invasion of these headwater streams. The next step therefore requires a proper management plan to protect these headwaters habitats. Co ...
Alternative stable states and regional community structure
... extinction dynamics to identify conditions for coexistence of species whose interactions lead to local ASE. We begin by showing that local ASE can persist regionally if each species has a refuge external to the system (a form of spatial heterogeneity). We then consider two mechanisms that may lead t ...
... extinction dynamics to identify conditions for coexistence of species whose interactions lead to local ASE. We begin by showing that local ASE can persist regionally if each species has a refuge external to the system (a form of spatial heterogeneity). We then consider two mechanisms that may lead t ...
Biological Diversity
... As long as people have written, they have written about the amazing diversty of life. Two movies released in 2005, March of the Penguins and Grizzly Man, reinforce this eternal fascination people have with the diversity of life on Earth, the wonderous adaptation of species to their environments, and ...
... As long as people have written, they have written about the amazing diversty of life. Two movies released in 2005, March of the Penguins and Grizzly Man, reinforce this eternal fascination people have with the diversity of life on Earth, the wonderous adaptation of species to their environments, and ...
A conceptual framework for marine biodiversity and ecosystem
... to remain unmodified over the long term. For example, the Baltic Sea was formed only after the last glaciation some 10,000 years ago and gained its current brackish water conditions no more than 7000 years ago; it is still undergoing dramatic abiotic and biotic changes (Voipio 1981). Change can be o ...
... to remain unmodified over the long term. For example, the Baltic Sea was formed only after the last glaciation some 10,000 years ago and gained its current brackish water conditions no more than 7000 years ago; it is still undergoing dramatic abiotic and biotic changes (Voipio 1981). Change can be o ...
Plasticity and trait-mediated indirect interactions among plants
... (Callaway 2007). But it is important to note that facilitation by one species on another may correspond with reciprocal negative, positive or neutral responses. Direct positive interactions may incorporate a wider range of mechanisms than direct negative interactions (Callaway 2007). Like competitio ...
... (Callaway 2007). But it is important to note that facilitation by one species on another may correspond with reciprocal negative, positive or neutral responses. Direct positive interactions may incorporate a wider range of mechanisms than direct negative interactions (Callaway 2007). Like competitio ...
Distribution and Reproductive Characteristics of Nonindigenous and
... many of these nonindigenous algae were first collected in or around harbors and gradually dispersed to neighboring areas. However, there is little information on the current distribution patterns of these plants throughout the Hawaiian Islands. To determine if these nonindigenous algae (or invasive ...
... many of these nonindigenous algae were first collected in or around harbors and gradually dispersed to neighboring areas. However, there is little information on the current distribution patterns of these plants throughout the Hawaiian Islands. To determine if these nonindigenous algae (or invasive ...
Brown and Nicoletto, 1991 - UNM Biology
... A single value of body mass was assigned to each species wherever it occurred; we ignored intraspecific geographic variation. The body masses were obtained from field guides (Burt and Grossenheider 1976; Whitaker 1980), from G. Ceballos (personal communication) for most Mexican species, and, in the ...
... A single value of body mass was assigned to each species wherever it occurred; we ignored intraspecific geographic variation. The body masses were obtained from field guides (Burt and Grossenheider 1976; Whitaker 1980), from G. Ceballos (personal communication) for most Mexican species, and, in the ...
Ctenophores of the Baltic and adjacent Seas – the invader
... southwestern Norwegian coasts. From the large populations observed, it is obvious that it must have been introduced before 2006, but remained unrecorded until this autumn. Key words: Baltic Sea, Skagerrak, North Sea, Mnemiopsis leidyi, invasive, first record ...
... southwestern Norwegian coasts. From the large populations observed, it is obvious that it must have been introduced before 2006, but remained unrecorded until this autumn. Key words: Baltic Sea, Skagerrak, North Sea, Mnemiopsis leidyi, invasive, first record ...
recor : monitoring network for coralligenous assemblages
... equivalent to those of tropical reef assemblages (Bianchi, 2001). Coralligenous habitat is, after the Posidonia seagrass beds, the second key benthic ecosystem of the Mediterranean in terms of biodiversity (Boudouresque, 2004). ...
... equivalent to those of tropical reef assemblages (Bianchi, 2001). Coralligenous habitat is, after the Posidonia seagrass beds, the second key benthic ecosystem of the Mediterranean in terms of biodiversity (Boudouresque, 2004). ...
Biodiversity and Plant-Animal Coevolution
... many higher plants for successful fructification, and active seed dispersal by animal vectors is a key demographic stage for maintaining forest regeneration and dynamics. Both processes depend on the provision by plants of some type of food resource that animals can obtain while foraging. These plan ...
... many higher plants for successful fructification, and active seed dispersal by animal vectors is a key demographic stage for maintaining forest regeneration and dynamics. Both processes depend on the provision by plants of some type of food resource that animals can obtain while foraging. These plan ...
PopBio 2012 Abstracts - Department of Evolutionary Biology and
... depend on the species’ potential responses, which are the outcome of species-‐specific traits. For simplicity, models often use a restricted species’ responses arsenal, in which competitive ability facilitates spec ...
... depend on the species’ potential responses, which are the outcome of species-‐specific traits. For simplicity, models often use a restricted species’ responses arsenal, in which competitive ability facilitates spec ...
Conservation Ecology: The Relations Among Threatened Species
... 1987, Gadgil 1987, Gadgil et al. 1993). There are critics who view the practice of taboos as irrational and a hindrance toward development (Edgerton 1992), who dismiss any ecological reasons behind them (Rea 1981), or who argue that the taboos may not be adhered to by some groups and, consequently, ...
... 1987, Gadgil 1987, Gadgil et al. 1993). There are critics who view the practice of taboos as irrational and a hindrance toward development (Edgerton 1992), who dismiss any ecological reasons behind them (Rea 1981), or who argue that the taboos may not be adhered to by some groups and, consequently, ...
PDF version of Report
... THÔNGto the remotely operated ing the seamount chains north of New the surface layer, where sunlight and genera, and species that Census deep margins discovered in the Nazare encountered a rush hour when anifor a career in the North Pacific, reconstructed the changing abunifera, protozoans with fals ...
... THÔNGto the remotely operated ing the seamount chains north of New the surface layer, where sunlight and genera, and species that Census deep margins discovered in the Nazare encountered a rush hour when anifor a career in the North Pacific, reconstructed the changing abunifera, protozoans with fals ...
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.