Concepts of species and modes of speciation
... (460–377 BC) described types of animals, but there is no indication of useful classification in his work. Plato (427– 347 BC) was, in the words of Mayr, ‘the great antihero of evolution’ as he believed in essentialism which is also referred to as the theory of forms. He used the term ‘Eidos’ for for ...
... (460–377 BC) described types of animals, but there is no indication of useful classification in his work. Plato (427– 347 BC) was, in the words of Mayr, ‘the great antihero of evolution’ as he believed in essentialism which is also referred to as the theory of forms. He used the term ‘Eidos’ for for ...
Scholarly Interest Report
... has seemingly allowed this invasive species, and possibly many others, to escape the ?to grow or defend? trade-off of plants. As a result, evolutionary-based increases in the competitive ability of introduced plant species potentially contributes to an invasive life-history. The newest member of our ...
... has seemingly allowed this invasive species, and possibly many others, to escape the ?to grow or defend? trade-off of plants. As a result, evolutionary-based increases in the competitive ability of introduced plant species potentially contributes to an invasive life-history. The newest member of our ...
BMC EcologyImage Competition 2015: the winning images
... rice, especially for non-Basmati type, short grain aromatic rice. This photograph shows grain diversity, in both grain shape/size and lemma-palea color, revealing a diverse set of short grain aromatic rice collection for their utilization.” Attribution: Pritesh S. Roy. ...
... rice, especially for non-Basmati type, short grain aromatic rice. This photograph shows grain diversity, in both grain shape/size and lemma-palea color, revealing a diverse set of short grain aromatic rice collection for their utilization.” Attribution: Pritesh S. Roy. ...
two ecosystem engineers interact to degrade deciduous forests of
... Rooney and Waller 2003; Rooney et al. 2004). Overbrowsing by deer can extirpate browse-sensitive species, or drive them to very low densities (Rooney and Dress 1997; Griggs et al. 2006). The result is a large change in the physiognomy of a forest. Browseresistant species are often structurally very ...
... Rooney and Waller 2003; Rooney et al. 2004). Overbrowsing by deer can extirpate browse-sensitive species, or drive them to very low densities (Rooney and Dress 1997; Griggs et al. 2006). The result is a large change in the physiognomy of a forest. Browseresistant species are often structurally very ...
Galapagos vertebrates: endangered status and conservation actions
... There are also avian diseases that may affect this species. Anthropogenic threats include climate change and potential impacts from tourism. The two sites have been visitor sites for decades, although they are seldom visited. The mangrove finch project began in 2006. Its goals and objectives include ...
... There are also avian diseases that may affect this species. Anthropogenic threats include climate change and potential impacts from tourism. The two sites have been visitor sites for decades, although they are seldom visited. The mangrove finch project began in 2006. Its goals and objectives include ...
Cross-Cordillera exchange mediated by the Panama Canal
... well-adapted species. However, if invasion occurs it will be disruptive and it is likely to cause the extinction of one or more resident species. The opposite view is that communities are loosely organized, with most species not precisely adapted to the sites that they occupy. Extinction of a specie ...
... well-adapted species. However, if invasion occurs it will be disruptive and it is likely to cause the extinction of one or more resident species. The opposite view is that communities are loosely organized, with most species not precisely adapted to the sites that they occupy. Extinction of a specie ...
The Impact of Invasive Species on Ecosystem Services and Human
... NIS are often imported as ornamentals but accidental NIS such as gypsy moths can be quite unpopular. ■ SUMMARY: Impacts of NIS on recreation and tourism are far more likely ...
... NIS are often imported as ornamentals but accidental NIS such as gypsy moths can be quite unpopular. ■ SUMMARY: Impacts of NIS on recreation and tourism are far more likely ...
PDF
... experiments. In single-species trials, typical field densities of oysters (Crassostrea virginica) reduced water-column chlorophyll a more strongly than clams (Mercenaria mercenaria). The non-native filter-feeding reef crab Petrolisthes armatus did not draw down chlorophyll a. In multi-species treatm ...
... experiments. In single-species trials, typical field densities of oysters (Crassostrea virginica) reduced water-column chlorophyll a more strongly than clams (Mercenaria mercenaria). The non-native filter-feeding reef crab Petrolisthes armatus did not draw down chlorophyll a. In multi-species treatm ...
pest risk assessment - Department of Primary Industries, Parks
... Perenties feed on insects, reptiles, birds, small mammals and carrion. Large adults can predate on small kangaroos. They are opportunistic cannibals and will feed on live and dead conspecifics. On Barrow Island Perenties eat turtle eggs and hatchlings. Although data is limited, Varanus giganteus pro ...
... Perenties feed on insects, reptiles, birds, small mammals and carrion. Large adults can predate on small kangaroos. They are opportunistic cannibals and will feed on live and dead conspecifics. On Barrow Island Perenties eat turtle eggs and hatchlings. Although data is limited, Varanus giganteus pro ...
Landscape Ecology and Ecosystems Management
... seeds, etc. between communities. These changes ultimately affect ecological processes such as gene flow and species composition in each community. For example, breaking up the forest or creating openings in the forest matrix creates smaller forest patches, with the matrix becoming open land (Figure ...
... seeds, etc. between communities. These changes ultimately affect ecological processes such as gene flow and species composition in each community. For example, breaking up the forest or creating openings in the forest matrix creates smaller forest patches, with the matrix becoming open land (Figure ...
Title: A new idea on the evolution of biodiversity
... Charles Darwin (1) and, at the same time, by Alfred R. Wallace (2). The understanding of the mechanisms that allow the origin of species and explain their current presence on planet Earth has shed light on many processes such as speciation, adaptation and extinction. In the following decades many hy ...
... Charles Darwin (1) and, at the same time, by Alfred R. Wallace (2). The understanding of the mechanisms that allow the origin of species and explain their current presence on planet Earth has shed light on many processes such as speciation, adaptation and extinction. In the following decades many hy ...
DNA Barcoding in Pencilfishes (Lebiasinidae: Nannostomus)
... geographic location. Indeed, some of these color variants have been described as separate species in the past [39–42]. Recently, molecular analyses were conducted in two Nannostomus species (N. eques and N. unifasciatus), both of which are widely distributed throughout the Amazon basin [43–44]. Stri ...
... geographic location. Indeed, some of these color variants have been described as separate species in the past [39–42]. Recently, molecular analyses were conducted in two Nannostomus species (N. eques and N. unifasciatus), both of which are widely distributed throughout the Amazon basin [43–44]. Stri ...
Using Biodiversity and Evenness Comparisons Among Plant
... describing plant species distributions. There is a dire need for baseline surveys that provide ecologists with detailed information about species abundance, dominance, and rarity in particular plant communities so that conservation managers have the tools to make conservation decisions. For example, ...
... describing plant species distributions. There is a dire need for baseline surveys that provide ecologists with detailed information about species abundance, dominance, and rarity in particular plant communities so that conservation managers have the tools to make conservation decisions. For example, ...
Frog Declines
... awareness that declines in amphibian populations are truly global in nature.[6] ...
... awareness that declines in amphibian populations are truly global in nature.[6] ...
Ecological Niches and Diversity Maintenance
... coexistence in the sense that if either species is perturbed to low density, it recovers from that low density state. In general, the MacArthur model leads to a stable equilibrium point. However, by stable coexistence, a stable equilibrium is not implied. Instead, the requirement is recovery of each ...
... coexistence in the sense that if either species is perturbed to low density, it recovers from that low density state. In general, the MacArthur model leads to a stable equilibrium point. However, by stable coexistence, a stable equilibrium is not implied. Instead, the requirement is recovery of each ...
Competition - Cal State LA
... • A concept that encompasses all of the individual environmental requirements of a species • This is definitely an abstract concept, but it helps us to organize and explain ecological phenomena ...
... • A concept that encompasses all of the individual environmental requirements of a species • This is definitely an abstract concept, but it helps us to organize and explain ecological phenomena ...
Biological Resources - City of Laguna Niguel
... terrain, changes in vegetation, or human disturbance. Corridors allow animals to move between remaining habitats. This mobility allows depleted animal populations to be replenished and promotes genetic diversity; provides escape routes from fire, predators, and human disturbances, thus reducing the ...
... terrain, changes in vegetation, or human disturbance. Corridors allow animals to move between remaining habitats. This mobility allows depleted animal populations to be replenished and promotes genetic diversity; provides escape routes from fire, predators, and human disturbances, thus reducing the ...
Plants and insects in early oldfield succession
... aspect of these studies is the inclusion of the above-ground arthropod fauna in terms of total density and guild structure. We consider insects primarily, although other arthropods are mentioned when they occur. An added dimension to our studies is that the two sites differ drastically in the propor ...
... aspect of these studies is the inclusion of the above-ground arthropod fauna in terms of total density and guild structure. We consider insects primarily, although other arthropods are mentioned when they occur. An added dimension to our studies is that the two sites differ drastically in the propor ...
global efforts to limit Australian acacia invasions
... It is still unclear to what extent biological invasions, and any impacts they might cause, can be predicted (e.g. Williamson, 1999). This is in part because of the many ways in which an invasion could arise (Blackburn et al., 2011). This creates a conflict in natural resource management – what shoul ...
... It is still unclear to what extent biological invasions, and any impacts they might cause, can be predicted (e.g. Williamson, 1999). This is in part because of the many ways in which an invasion could arise (Blackburn et al., 2011). This creates a conflict in natural resource management – what shoul ...
1 THE PURPOSE, COSTS AND BENEFITS OF FISH
... and Kariba however lacked pelagic fish species which could feed on the planktonic organisms which were ...
... and Kariba however lacked pelagic fish species which could feed on the planktonic organisms which were ...
Evaluating Multispecies Landscape Connectivity in a Threatened
... species to track their fundamental niches in geographic space as climate changes (Brodie et al. 2012; Cross et al. 2012). However, most corridor planning initiatives focus on single species (Beier et al. 2008; Beier et al. 2011). Because so many species are threatened by fragmentation, habitat corri ...
... species to track their fundamental niches in geographic space as climate changes (Brodie et al. 2012; Cross et al. 2012). However, most corridor planning initiatives focus on single species (Beier et al. 2008; Beier et al. 2011). Because so many species are threatened by fragmentation, habitat corri ...
Copenhaver 1 Lake and Bog Fish Survey and Water
... gibbosus (0.7283) being found at Morris. Meanwhile the negative high loading species were found at Tuesday consisting of Notropis photogenis (0.4722), Culaea icanstans (0.4880), Pimephaes promelas (0.6185), and Pimephales ...
... gibbosus (0.7283) being found at Morris. Meanwhile the negative high loading species were found at Tuesday consisting of Notropis photogenis (0.4722), Culaea icanstans (0.4880), Pimephaes promelas (0.6185), and Pimephales ...
Strong asymmetrical inter-specific relationships in food web
... top 5%). We did not consider relationships that are strong in both directions: this kind of symmetry makes inter-specific relationships unclear and unpredictable, while asymmetrical relationships may provide more insights about the flow of indirect effects in ecosystems. It is important to emphasize ...
... top 5%). We did not consider relationships that are strong in both directions: this kind of symmetry makes inter-specific relationships unclear and unpredictable, while asymmetrical relationships may provide more insights about the flow of indirect effects in ecosystems. It is important to emphasize ...
internal parasites of lizards from taiwan
... Parasites also may be introduced into new localities along with invasive species. When naïve host populations are infected by a new parasite transported by an introduced host, the invasive host species may acquire an advantage over the local species, which would contribute to the success of the inva ...
... Parasites also may be introduced into new localities along with invasive species. When naïve host populations are infected by a new parasite transported by an introduced host, the invasive host species may acquire an advantage over the local species, which would contribute to the success of the inva ...
This article was originally published in a journal
... each substrate was submerged in seawater and the center 68 cm2 area was examined. To analyze the relative attractiveness of different substrate types as settlement space, a census was performed to quantify species richness. To compare how the amount of space occupied differed between substrate types ...
... each substrate was submerged in seawater and the center 68 cm2 area was examined. To analyze the relative attractiveness of different substrate types as settlement space, a census was performed to quantify species richness. To compare how the amount of space occupied differed between substrate types ...
Introduced species
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.