invasive species - the National Sea Grant Library
... animal distributing the plant’s seeds. In some places, invaders cause ecosystem changes that profoundly alter the landscape and the ecosystem services we value. For example, bluegrass in Kentucky and some other ecosystems we take for granted in the United States are actually a result of successful i ...
... animal distributing the plant’s seeds. In some places, invaders cause ecosystem changes that profoundly alter the landscape and the ecosystem services we value. For example, bluegrass in Kentucky and some other ecosystems we take for granted in the United States are actually a result of successful i ...
What is the impact of Impatiens glandulifera on
... (with at least 60% of I. glandulifera cover) and nearby uninvaded vegetation (further termed ‘‘comparative invaded and uninvaded’’). Uninvaded plots were selected as to represent the same habitat condition as the corresponding invaded plots (Pysˇek and Pysˇek, 1995). Some individuals of I. glandulif ...
... (with at least 60% of I. glandulifera cover) and nearby uninvaded vegetation (further termed ‘‘comparative invaded and uninvaded’’). Uninvaded plots were selected as to represent the same habitat condition as the corresponding invaded plots (Pysˇek and Pysˇek, 1995). Some individuals of I. glandulif ...
Ecological Impacts of Non-native Freshwater Fishes (Cucherousset
... fishes across multiple levels of biological organization (ranging from the genome to the ecosystem) and conclude with a prospectus of needed areas of scientific inquiry to advance this understanding. Our investigation focuses on the negative impacts of fish introductions, although we readily acknowl ...
... fishes across multiple levels of biological organization (ranging from the genome to the ecosystem) and conclude with a prospectus of needed areas of scientific inquiry to advance this understanding. Our investigation focuses on the negative impacts of fish introductions, although we readily acknowl ...
Negative competitive effects of invasive plants change with time
... greenhouse microcosm and common garden pairwise experiments to measure the growth response of native plants in the presence of terrestrial plant invaders (totaling 36 species), and compared this to the time since invasion at the collection site (number of years between the estimated year of initial ...
... greenhouse microcosm and common garden pairwise experiments to measure the growth response of native plants in the presence of terrestrial plant invaders (totaling 36 species), and compared this to the time since invasion at the collection site (number of years between the estimated year of initial ...
Ecological Factors Affecting Community Invasibility
... understand the relative importance of biotic and abiotic factors that determine community composition. The fact that we are still exploring this topic today hints at both its importance and complexity. As the impacts from harmful non-native species accumulate, it has become increasingly urgent to fi ...
... understand the relative importance of biotic and abiotic factors that determine community composition. The fact that we are still exploring this topic today hints at both its importance and complexity. As the impacts from harmful non-native species accumulate, it has become increasingly urgent to fi ...
The influence of biodiversity on invasibility of terrestrial plant
... The major feature of diversity which negatively affects invasion is resource partitioning. As evidenced by the intermediate disturbance hypothesis, resource partitioning is not a prerequisite for diversity. Even if diversity has arisen in stable environments, competition can still be interrupted by ...
... The major feature of diversity which negatively affects invasion is resource partitioning. As evidenced by the intermediate disturbance hypothesis, resource partitioning is not a prerequisite for diversity. Even if diversity has arisen in stable environments, competition can still be interrupted by ...
Origin matters: alien consumers inflict greater damage on prey
... following keywords: introduced species, alien species, nonindigenous species, non-native species, colonizing species or exotic species; we then combined that search with one using the keywords predat*, herbivore* or prey. To obtain more studies involving native consumers and native prey, we conducte ...
... following keywords: introduced species, alien species, nonindigenous species, non-native species, colonizing species or exotic species; we then combined that search with one using the keywords predat*, herbivore* or prey. To obtain more studies involving native consumers and native prey, we conducte ...
SOC - UNESCO World Heritage Centre
... seeds. There have also been reports of other invasive species Gutenbergia (Erlangea) cordifolia and Bidens spp., which have infested up to one-quarter of the Crater floor. The State Party has noted that it is aware of the situation with these invasive species and has been carrying out some initiativ ...
... seeds. There have also been reports of other invasive species Gutenbergia (Erlangea) cordifolia and Bidens spp., which have infested up to one-quarter of the Crater floor. The State Party has noted that it is aware of the situation with these invasive species and has been carrying out some initiativ ...
Ecological effects of invasive alien insects
... Relevant primary research publications on the ecological effects of invasive alien insects were first identified by electronic searches in CAB Abstracts covering the period 1900–2007. Since the terminology used in the context of invasive species has changed during this period, the widest possible va ...
... Relevant primary research publications on the ecological effects of invasive alien insects were first identified by electronic searches in CAB Abstracts covering the period 1900–2007. Since the terminology used in the context of invasive species has changed during this period, the widest possible va ...
Invasive Alien Species in Nova Scotia
... reaching our province, some alien species demonstrate ecological advantages that help them outcompete, displace, or destroy native species. For example, Smallmouth Bass are good at competing for space and nutrients. Others, like Beech Bark Disease, simply attack and destroy native species. Some Inva ...
... reaching our province, some alien species demonstrate ecological advantages that help them outcompete, displace, or destroy native species. For example, Smallmouth Bass are good at competing for space and nutrients. Others, like Beech Bark Disease, simply attack and destroy native species. Some Inva ...
A comparison of invasive and non
... been introduced outside their native range, primarily as ornamentals (e.g. Gardino Nursery, 2004; NRCS Plants, 2004), although not necessarily with the same propagule pressure as the invaders. Nutrient gradient experiment I compared the performance of two pairs of invasive and noninvasive species ac ...
... been introduced outside their native range, primarily as ornamentals (e.g. Gardino Nursery, 2004; NRCS Plants, 2004), although not necessarily with the same propagule pressure as the invaders. Nutrient gradient experiment I compared the performance of two pairs of invasive and noninvasive species ac ...
Review of harvest incentives to control invasive species
... specified life history stages, such as larger and more mature individuals, may still have a positive benefit on the ecosystem. These benefits may include a reduction in negative impacts from a reduced average size, although the extent of such benefits will depend on the impacts caused by other membe ...
... specified life history stages, such as larger and more mature individuals, may still have a positive benefit on the ecosystem. These benefits may include a reduction in negative impacts from a reduced average size, although the extent of such benefits will depend on the impacts caused by other membe ...
Five Potential Consequences of Climate Change for Invasive Species
... Abstract: Scientific and societal unknowns make it difficult to predict how global environmental changes such as climate change and biological invasions will affect ecological systems. In the long term, these changes may have interacting effects and compound the uncertainty associated with each indi ...
... Abstract: Scientific and societal unknowns make it difficult to predict how global environmental changes such as climate change and biological invasions will affect ecological systems. In the long term, these changes may have interacting effects and compound the uncertainty associated with each indi ...
Protecting threatened species and ecological communities from
... example, weeds account for 52 (43%) of the 120 most widely distributed plant ...
... example, weeds account for 52 (43%) of the 120 most widely distributed plant ...
AqUAtic INvAdERS
... surfaces) emerge. It is usually striped with dark bands but can also be pure black or unpigmented. The quagga mussel is larger, up to 4 cm long, with a more-rounded shell. It usually has dark, concentric rings on the shell that are paler near the hinge. There is a small groove near the hinge where b ...
... surfaces) emerge. It is usually striped with dark bands but can also be pure black or unpigmented. The quagga mussel is larger, up to 4 cm long, with a more-rounded shell. It usually has dark, concentric rings on the shell that are paler near the hinge. There is a small groove near the hinge where b ...
Competition strength of two significant invasive
... it is more efficient in using available nutrients for growth. Under both high and low nutrients, the biomass of roots and shoots at the end of the experiment were higher for bitou bush seedlings growing alone than seedlings of either native. In fact, under high nutrients, bitou bush root biomass w ...
... it is more efficient in using available nutrients for growth. Under both high and low nutrients, the biomass of roots and shoots at the end of the experiment were higher for bitou bush seedlings growing alone than seedlings of either native. In fact, under high nutrients, bitou bush root biomass w ...
A Record of Small-Clawed Otters
... select less nutritious species if high quality alternatives are rare. Here it may, however, just indicate the opportunistic nature of otter diet. If this could be established, it may help in devising conservation measures for native prey species. Further diet composition data from spraint analysis i ...
... select less nutritious species if high quality alternatives are rare. Here it may, however, just indicate the opportunistic nature of otter diet. If this could be established, it may help in devising conservation measures for native prey species. Further diet composition data from spraint analysis i ...
Costs and benefits of biological control of invasive alien
... and economic impacts. Such species are often controlled biologically by means of introducing host-specific insects or pathogens that can reduce the species’ invasive potential. In many cases, plants are brought under complete control. In this paper, we describe an attempt to estimate the costs and b ...
... and economic impacts. Such species are often controlled biologically by means of introducing host-specific insects or pathogens that can reduce the species’ invasive potential. In many cases, plants are brought under complete control. In this paper, we describe an attempt to estimate the costs and b ...
smooth cordgrass Spartina alterniflora Loisel.
... Impact on ecosystem processes: Spartina species increase sediment deposition in coastal and interior marshes (Hitchcock 1971). Large, dense populations of cordgrass can decrease water flow and cause flooding at the mouths of rivers. The establishment of Spartina species in mudflats will favor invert ...
... Impact on ecosystem processes: Spartina species increase sediment deposition in coastal and interior marshes (Hitchcock 1971). Large, dense populations of cordgrass can decrease water flow and cause flooding at the mouths of rivers. The establishment of Spartina species in mudflats will favor invert ...
Invasiveness Does Not Predict Impact: Response of Native Land
... several invasive plants on multiple criteria of mollusc performance. Such impacts are, however, likely to differ; mollusc assemblages were shown to respond strongly to the change in vegetation, with associated changes in calcium content and humidity being the most important factors determining their ...
... several invasive plants on multiple criteria of mollusc performance. Such impacts are, however, likely to differ; mollusc assemblages were shown to respond strongly to the change in vegetation, with associated changes in calcium content and humidity being the most important factors determining their ...
Competition among native and invasive Impatiens species: the roles
... immediately after introduction into a new range the species need to cope with the local environment, especially climatic conditions (Wiens and Graham 2005), later on different mechanisms involving interactions, or their absence, with resident biota come into play. It has been suggested that some inv ...
... immediately after introduction into a new range the species need to cope with the local environment, especially climatic conditions (Wiens and Graham 2005), later on different mechanisms involving interactions, or their absence, with resident biota come into play. It has been suggested that some inv ...
Source - Wilmington College
... extracts (Dorning and Cipollini 2006, Cipollini et al. 2008b, Cipollini et al. 2012b). Though L. maackii shoot and root extracts have been compared previously (Dorning and Cipollini 2006, Cipollini and Dorning 2008), our study is the first to compare root and shoot extracts of A. petiolata and R. fi ...
... extracts (Dorning and Cipollini 2006, Cipollini et al. 2008b, Cipollini et al. 2012b). Though L. maackii shoot and root extracts have been compared previously (Dorning and Cipollini 2006, Cipollini and Dorning 2008), our study is the first to compare root and shoot extracts of A. petiolata and R. fi ...
Commonwealth Funding to Help Protect Northern Quolls
... The cane toad was originally introduced to Queensland to kill pests in cane fields in the 1930s. Since then, the cane toad has spread south as far as Port Macquarie in NSW, reached Kakadu National Park in 2001 and continues to expand its range southwards and north-west. Current estimates show cane t ...
... The cane toad was originally introduced to Queensland to kill pests in cane fields in the 1930s. Since then, the cane toad has spread south as far as Port Macquarie in NSW, reached Kakadu National Park in 2001 and continues to expand its range southwards and north-west. Current estimates show cane t ...
The impacts of invasive plant species on the biodiversity of
... invade while others contribute relatively little to total plant biomass even though they are abundant. It is possible for a species to be relatively uncommon, or contribute only a small amount to total biomass and yet have a disproportional influence on biodiversity or ecosystem function relative to ...
... invade while others contribute relatively little to total plant biomass even though they are abundant. It is possible for a species to be relatively uncommon, or contribute only a small amount to total biomass and yet have a disproportional influence on biodiversity or ecosystem function relative to ...
Vertebrate species introductions in the United States and its territories
... that we have compiled is quite long because we have included many species that are native to North America, but have been translocated to states, drainages, or regions in which they did not occur historically. We have also included some species that have expanded their historic range in recent decad ...
... that we have compiled is quite long because we have included many species that are native to North America, but have been translocated to states, drainages, or regions in which they did not occur historically. We have also included some species that have expanded their historic range in recent decad ...
Invasive species
An invasive species is a plant or animal that is not native to a specific location (an introduced species); and has a tendency to spread, which is believed to cause damage to the environment, human economy and/or human health.One study pointed out widely divergent perceptions of the criteria for invasive species among researchers (p. 135) and concerns with the subjectivity of the term ""invasive"" (p. 136). Some of the alternate usages of the term are below:The term as most often used applies to introduced species (also called ""non-indigenous"" or ""non-native"") that adversely affect the habitats and bioregions they invade economically, environmentally, and/or ecologically. Such invasive species may be either plants or animals and may disrupt by dominating a region, wilderness areas, particular habitats, or wildland-urban interface land from loss of natural controls (such as predators or herbivores). This includes non-native invasive plant species labeled as exotic pest plants and invasive exotics growing in native plant communities. It has been used in this sense by government organizations as well as conservation groups such as the International Union for Conservation of Nature (IUCN) and the California Native Plant Society. The European Union defines ""Invasive Alien Species"" as those that are, firstly, outside their natural distribution area, and secondly, threaten biological diversity. It is also used by land managers, botanists, researchers, horticulturalists, conservationists, and the public for noxious weeds. The kudzu vine (Pueraria lobata), Andean Pampas grass (Cortaderia jubata), and yellow starthistle (Centaurea solstitialis) are examples.An alternate usage broadens the term to include indigenous or ""native"" species along with non-native species, that have colonized natural areas (p. 136). Deer are an example, considered to be overpopulating their native zones and adjacent suburban gardens, by some in the Northeastern and Pacific Coast regions of the United States.Sometimes the term is used to describe a non-native or introduced species that has become widespread (p. 136). However, not every introduced species has adverse effects on the environment. A nonadverse example is the common goldfish (Carassius auratus), which is found throughout the United States, but rarely achieves high densities (p. 136).