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23 results for “island invasive species”
Invasive snakes on islands: dataset and species vignettes
<p>This dataset describes known introductions of snakes to islands outside of their respective historical, native ranges as of May, 2022. It was created during the preparation of the chapter "Welcome to paradise: snake invasions on islands" for the upcoming book <em>Islands and Snakes</em>, Vol. II. Details for this accompanying summary text will be provided upon final publication.</p> <p>It contains a spreadsheet/database of individual documented introductions (Island_Snakes_data_cleaned), and vignettes organized by species that summarize introductions and provide references.</p> <p> </p> <p><em><strong>Island_Snakes_data_cleaned Database Details</strong></em></p> <p>The database contains several categories of information; categories are listed in bold below.</p> <ul> <li><strong>General Introduction information</strong></li> </ul> <p>Introduced Country = the country authority over the geographic location of introduction event</p> <p>Introduced to Island = the name of the island where a snake was introduced</p> <p>Island Group Name = the name of the island grouping, if any exists</p> <p>Introduced Ocean of Sea = the name of the body(ies) of water surrounding the island where a snake was introduced</p> <p>Native Range = a general description of where the snake is native to, if known</p> <p>Date Introduced Note = any details in addition to the year provided in Date Introduced column</p> <p>Date Introduced = the date a snake was considered or recorded as introduced to an island. These dates are often approximate of based on year of publication.</p> <p>Established = a binary variable where 1 indicates a snake has established a population on that island, and 0 indicates it has not established or there is not enough evidence to determine this status.</p> <p>Currently Present on island = a binary variable where 1 indicates a snake is present on that island, and 0 indicates it is not present or there is not enough evidence to determine this status.</p> <p> </p> <ul> <li><strong>Pathway information - </strong>these variables describe known pathways of introduction to an island. All variables are binary; 1 indicates the pathway likely contributed to the introduction of the snake, 0 indicates it likely did not or there is not evidence to support that pathway.</li> </ul> <p>Nursery Trade - introduced as a result of nursery or plant trade</p> <p>Cargo - introduced as a result of cargo that is not specifically associated with nursery or plant trade</p> <p>Pet Trade - introduced as a result of importation for eventual keeping as a pet or in captive hobby herpetoculture, or escape</p> <p>Intentional - introduced intentionally to the wild by a person intending to establish a population or releasing an animal for non-religious purposes</p> <p>Industrial - introduced as a result of an industry not described in other pathways; e.g. entertainment industry, skin trade</p> <p>Research - introduced as a result of escape or release from captive animals used for research purposes</p> <p>Medicinal - introduced as a result of medicinal trade in animals</p> <p>Food - introduced as a result animals traded or imported for consumption</p> <p>Pathway comment - additional details about the pathway associated with the introduction event</p> <p> </p> <ul> <li><strong>Introduced island characteristics - </strong>attributes of the ecology and geography where snakes have been introduced. Binary variables 1 indicate there is evidence for the category, 0 indicates there is not evidence for that category. *Note*: we did not consider fully-aquatic sea-snakes in our determination of island ecology characteristics</li> </ul> <p>introduced to historically snake-free - 1 indicates that prior to the snake's introduction, no other snakes were present on the island.</p> <p>introduced to island with native snakes already there - 1 indicates that prior to the snake's introduction, native snakes were already present</p> <p>introduced to island with ecologically similar snake - 1 indicates that prior to the snake's introduction, a snake with similar ecotype was already present (native or non-native).</p> <p>introduced island with same family - 1 indicates that prior to the snake's introduction, another snake of the same family was already present (native or non-native).</p> <p>introduced island with same genus - 1 indicates that prior to the snake's introduction, another snake of the same genus was already present (native or non-native).</p> <p>island area km2 - a rough estimate of the island's total geographic area in km<sup>2</sup></p> <p>nearest large landmass (>10000km2) - the name of the nearest landmass (greater than 10,000 km<sup>2 </sup>in area) to the island where a snake was introduced (as determined by linear distance).</p> <p>distance to nearest large landmass/mainland (km) - an estimate of the linear distance from the island where a snake was introduced to the nearest landmass greater than 10,000 km<sup>2 </sup> in area.</p> <p>distance to native origin (rough km) - a rough estimate of the linear distance from the snake's native range (and source of non-native introduction, if known) to the island where the snake has been introduced. </p> <p>Native_to_nearest_large_landmass - a binary variable where 1 indicates the snake is native to the nearest large landmass names in the nearest large landmass (>10000km2) column.</p> <p>island status comment - any additional information about the ecology of geography of the island where a snake was introduced.</p> <p> </p> <ul> <li><strong>Snake characteristics - </strong>Attributes associated with the ecotype and diet of the snakes introduced to islands. Binary variables indicate whether there is evidence to support a snake's membership to a specific category.</li> </ul> <p>Constrictor - 1 indicates the snake can be classified as a constrictor- using strangulation and squeezing to subdue prey.</p> <p>Venomous - 1 indicates the snake can be classified as venomous.</p> <p>Fossorial - 1 indicates the snake can be classified as fossorial; dwelling on ground in soil or leaf litter</p> <p>Terrestrial - 1 indicates the snake can be classified as terrestrial; living on the ground but generally not in soil or leaf litter</p> <p>Aquatic - 1 indicates the snake can be classified as aquatic, living at the water's edge or near the water.</p> <p>Arboreal - 1 indicates the snake can be classified as arboreal; living mostly in trees</p> <p>Cave-dwelling (troglodytic) - 1 indicates the snake can be classified as Cave-dwelling or troglodytic</p> <p>max SVL in mm (estimate) - the maximum snout-to-vent length recorded for the introduced snake species; this information may be derived from either native or introduced ranges</p> <p>Generalist - 1 indicates the snake can be classified as having a generalist diet</p> <p>Specialist - 1 indicates the snake can be classified as having a specialist diet</p> <p>Mammals - 1 indicates the snake is documented as consuming mammals</p> <p>Birds - 1 indicates the snake is documented as consuming birds</p> <p>Amphibs - 1 indicates the snake is documented as consuming amphibians</p> <p>Reptiles - 1 indicates the snake is documented as consuming reptiles</p> <p>Inverts - 1 indicates the snake is documented as consuming invertebrates</p> <p> </p> <ul> <li><strong>Impacts of introduction - </strong> a summary of any documented impacts associated with the introduction of the snake to the island. </li> </ul> <p>Ecological Impacts - 1 indicates there is documentation to support an impact of the snake's introduction to the island's ecology</p> <p>Health Impacts - 1 indicates there is documentation to support an impact of the snake's introduction to human health on the island</p> <p>Economic Impacts - 1 indicates there is documentation to support an impact of the snake's introduction to the local economy of the island</p> <p>Impacts not measured - 1 indicates there is no formal documentation of impacts of the snake to any of the previous categories</p> <p>Impact Comment - any details about impacts, or speculated impacts</p> <p> </p> <ul> <li><strong>Management </strong></li> </ul> <p>Previous eradication Efforts - 1 indicates there have been measures taken in the past to attempt to remove the snake species from the island</p> <p>Current eradication effort - 1 indicates that as of May 2022, attempts to remove the snake species from the island are ongoing.</p> <p> </p> <p>Cool Stuff! -<strong> </strong>a category with comments on introductions that do not fit neatly elsewhere</p> <p> </p> <p><em><strong>Vignette details</strong></em></p> <p>Vignettes are organized by species, using the most up-to-date accepted species name according to the Reptile Database in May, 2022. The vignette describes documented introductions to islands, which includes multiple locations for some species.</p> <p>All vignettes follow a similar format.</p> <p><em>Species name</em> and any relevant synonyms or colloquial names are given.<br> <em>Where native</em>- describes the native range of the snake, if known.<br> <em>Where introduced, when </em>- describes the islands where a snake has been documented as introduced, and the associated dates of introduction (if they differ from the publication date)</p> <p><em>Introduced Island characteristics - </em>gives any relevant information about the ecology or geography of the island(s) where the species has been introduced</p> <p><em>Pathways of introduction </em>- gives information about pathway(s) relevant to introductions</p> <p><em>Why successful introduction </em>- if the introduction was successful (i.e. established), what factors may have played a role in this success</p> <p><em>Any failed island introductions elsewhere, why?</em> - If introductions are recorded as not established or failed, any information that may help understand the failure of the introduction to establish.</p> <p><em>Documented impacts of introduction (Ecological, Economic, Social, Human Health)</em> - any impacts documented from the introduction of the species to the island(s)</p> <p><em>Speculated impacts</em> - any potential impacts of the species' introduction to the island(s), whether unrecorded, unexamined, or estimated to have a lag time before apparent</p> <p><em>References - </em>References cited within the vignette</p> <p> </p>
Effects of experimental manipulation of light and nutrients on establishment of seedlings of native and invasive woody species in Long Island, NY, USA forests 2000 - 2003
While several studies on the process of invasion often focused on single factors or on the general explanation of ‘disturbance,' recent work has attempted to move towards a more mechanistic understanding of the factors that promote plant community invasion. Manipulative experiments provide a means for discerning causal relationships and interactive effects of environmental factors in promoting invasion. This dataset contains the results of multifactor manipulative experiments in forest communities, which compared factors influencing early seedling establishment for native and invasive woody plants. In an earlier study, we found that in Long Island, NY, invasion patterns are correlated with forest community type (pine barrens or hardwood), light availability, and soil N and Ca. Therefore, we conducted manipulative field experiments in two different years to determine the relative importance and interaction of experimental gaps and N and Ca addition in pine barrens and hardwood forests in promoting invasion. We used seedlings of seven common native and invasive species in the first experiment, and 16 native and invasive species paired phylogenetically in the second experiment. This was done in the years 2000 and 2003 respectively.
Figure 1 in Sarucallis kahawaluokalani (Kirkaldy) (Hemiptera: Aphididae), a new invasive aphid on San Andres island and mainland Colombia, with notes on other adventive species
Figure 1. Adult female of Sarucallis kahawaluokalani (Kirkaldy). A. Alate female in life. Palmira, Colombia. B. Slide-mounted alate female. Notice large bifid tubercle (see arrow). Photo A taken by T. Kondo; B by R. Simbaqueba- Cortés.
Figure 2 in Sarucallis kahawaluokalani (Kirkaldy) (Hemiptera: Aphididae), a new invasive aphid on San Andres island and mainland Colombia, with notes on other adventive species
Figure 2. Recent invasive species in Colombia. A. Diaphorina citri Kuwayama. B. Ceroplastes rubens Maskell. C. Crypticerya multicicatrices Kondo and Unruh. D. Maconellicoccus hirsutus (Green). E. Harmonia axyridis (Pallas). F. Singhiella simplex (Singh). Photos taken by T. Kondo.
Table S1 - Economic Costs of Protecting Islands from Invasive Alien Species
<p>Dataset analysed in relation to the paper 'Economic Costs of Protecting Islands from Invasive Alien Species' published in Conservation Biology in 2022</p>
Appendix 7 to "The Status of Biological Invasions and their Management in South Africa in 2022"—The Species List for the Prince Edward Islands
<p>SANBI and CIB 2023. Appendix 7 to "The Status of Biological Invasions and their Management in South Africa in 2022"—The Species List for the Prince Edward Islands. South African National Biodiversity Institute, Kirstenbosch and DSI-NRF Centre of Excellence for Invasion Biology, Stellenbosch. http://dx.doi.org/10.5281/zenodo.8217229</p> <p> </p> <p>For more details see: http://iasreport.sanbi.org.za<br> For the report itself see: http://dx.doi.org/10.5281/zenodo.8217182</p>
Resource competition drives an invasion-replacement event among shrew species on an island
<p>Invasive mammals are responsible for the majority of native species' extinctions on islands. While most of these extinction events will be due to novel interactions between species (e.g. exotic predators and naive prey), it is more unusual to find incidences where a newly invasive species cause the decline/extinction of a native species on an island when they normally coexist elsewhere in their overlapping mainland ranges.</p> <p>We investigated if resource competition between two insectivorous small mammals was playing a significant role in the rapid replacement of the native pygmy shrew (<em>Sorex minutus</em>) in the presence of the recently invading greater white-toothed shrew (<em>Crocidura russula</em>) on the island of Ireland.</p> <p>We used DNA metabarcoding of gut contents from >300 individuals of both species to determine each species' diet and measured the body size (weight and length) during different stages of the invasion in Ireland (before, during, and after the species come into contact with one another) and on a French island where both species have long coexisted (acting as a natural 'control' site). Dietary composition, niche width, and overlap, and body size were compared in these different stages.</p> <p>The body size of the invasive <em>C. russula</em> and the composition of its diet change between when it first invades an area and after it becomes established. During the initial stages of the invasion, individual shrews are larger and consume larger-sized invertebrate prey species. During the later stages of the invasion, <em>C. russula</em> switch to consuming smaller prey taxa that are more essential for the native species. As a result, the level of interspecific dietary overlap increases from between 11–14% when they first come into contact with each other to between 39–46% after the invasion.</p> <p>Here we show that an invasive species can quickly alter its dietary niche in a new environment, ultimately causing the replacement of a native species. In addition, the invasive shrew could also be potentially exhausting the local resources of larger invertebrate species. These subsequent changes in terrestrial invertebrate communities could have severe impacts further downstream on ecosystem functioning and services.</p>
Resource competition drives an invasion-replacement event among shrew species on an island
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Data from: Population genomics of Sitka black-tailed deer supports invasive species management and ecological restoration on islands
<p>Invasive mammals represent a critical threat to island biodiversity; eradications can result in ecological restoration yet may fail in the absence of key population parameters. Over-browsing by invasive Sitka black-tailed deer (<em>Odocoileus hemionus sitkensis</em>) is causing severe ecological and cultural impacts across the Haida Gwaii archipelago (Canada). Previous eradication attempts demonstrate forest regeneration upon deer removal, but reinvasion reverses conservation gains. Here we use restriction-site associated DNA sequencing (12,947 SNPs) to investigate connectivity and gene flow of invasive deer (n=181) across 15 islands, revealing little structure throughout Haida Gwaii and identifying the large, central island of Moresby (>2,600 km2) as the greatest source of migrants. As a result, the archipelago itself should be considered the primary eradication unit, with the exception of geographically isolated islands like SGang Gwaay. Thus, limiting eradications to isolated islands combined with controlled culling and enhanced biosecurity may be the most effective strategies for achieving ecological restoration goals.</p>
FIGURE 4 in The invasive land flatworm Obama nungara in La Réunion, a French island in the Indian Ocean, the first report of the species for Africa
FIGURE 4. Climatic suitability of Obama nungara in La Réunion. Names of communes and their limits (white lines) are indicated. The three localities where the specimens were found (Petite France, Plaine des Grègues and Gîte de la Bergerie) are indicated.
FIGURE 1 in The invasive land flatworm Obama nungara in La Réunion, a French island in the Indian Ocean, the first report of the species for Africa
FIGURE 1. Photo of a live specimen of Obama nungara, taken in Petite France in the commune of Saint Paul, La Réunion. Photo by Régis Bretzner, taken 10 June 2021. The specimen is brown on the back, with darker brown striae, a reddish tip, and with a cream stripe running a short distance from the head towards the tail, but which soon disappears into the general colour of the back.
FIGURE 2 in The invasive land flatworm Obama nungara in La Réunion, a French island in the Indian Ocean, the first report of the species for Africa
FIGURE 2. Photo of a live specimen of Obama nungara, taken in la Plaine des Grègues in the commune of Saint Joseph, La Réunion. Specimen collected 22 April 2021 by Renaud Hoarau, photograph taken by Nicolas Huet. The photo clearly shows the dark brown striae on the brownish coloured back, and the whitish under surface.
Data from: Impacts of an invasive ant species on roosting behaviour of an island endemic flying-fox
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Data from: Population genomics of Sitka black-tailed deer supports invasive species management and ecological restoration on islands
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Supplementary material 1 from: Hoffmann BD, Brewington L, Andreozzi P, Boudjelas S, Day MD, Ero M, Jackson T, Martin C, Montgomery M (2024) Three new strategies for improving biosecurity and invasive species management to build resilience in Pacific Islands. NeoBiota 92: 193-210. https://doi.org/10.3897/neobiota.92.122103
Supplementary data
Supplementary material 1 from: Huisman SN, Jesse WAM, Ellers J, van Beukering PJH (2021) Mapping the economic loss of ecosystem services caused by the invasive plant species Antigonon leptopus on the Dutch Caribbean Island of St. Eustatius. One Ecosystem 6: e72881. https://doi.org/10.3897/oneeco.6.e72881
Tree cover map St. Eustatius
Supplementary material 3 from: Huisman SN, Jesse WAM, Ellers J, van Beukering PJH (2021) Mapping the economic loss of ecosystem services caused by the invasive plant species Antigonon leptopus on the Dutch Caribbean Island of St. Eustatius. One Ecosystem 6: e72881. https://doi.org/10.3897/oneeco.6.e72881
Important birding areas St. Eustatius
Supplementary material 2 from: Huisman SN, Jesse WAM, Ellers J, van Beukering PJH (2021) Mapping the economic loss of ecosystem services caused by the invasive plant species Antigonon leptopus on the Dutch Caribbean Island of St. Eustatius. One Ecosystem 6: e72881. https://doi.org/10.3897/oneeco.6.e72881
Iguana sightings map St. Eustatius
Supplementary material 4 from: Huisman SN, Jesse WAM, Ellers J, van Beukering PJH (2021) Mapping the economic loss of ecosystem services caused by the invasive plant species Antigonon leptopus on the Dutch Caribbean Island of St. Eustatius. One Ecosystem 6: e72881. https://doi.org/10.3897/oneeco.6.e72881
Morning Glory map St. Eustatius
Supplementary material 5 from: Huisman SN, Jesse WAM, Ellers J, van Beukering PJH (2021) Mapping the economic loss of ecosystem services caused by the invasive plant species Antigonon leptopus on the Dutch Caribbean Island of St. Eustatius. One Ecosystem 6: e72881. https://doi.org/10.3897/oneeco.6.e72881
Dive sites around St. Eustatius
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