scholarly journals Extended consequences of selection by exotic invaders on natives

2021 ◽  
Author(s):  
Daniel Z. Atwater ◽  
Ragan M. Callaway
Keyword(s):  
Exotic Invaders

scholarly journals Exotic invaders gain foraging benefits by shoaling with native fish

2014 ◽  
Vol 1 (3) ◽  
pp. 140101 ◽  
Author(s):  
Morelia Camacho-Cervantes ◽  
Constantino Macías Garcia ◽  
Alfredo F. Ojanguren ◽  
Anne E. Magurran
Keyword(s):  
Ecological Niche ◽  
Poecilia Reticulata ◽  
Foraging Efficiency ◽  
Native Fish ◽  
Exotic Fish ◽  
High Plateau ◽  
Feral Population ◽  
Freshwater Habitats ◽  
Exotic Invaders

Freshwater habitats are under increasing threat due to invasions of exotic fish. These invasions typically begin with the introduction of small numbers of individuals unfamiliar with the new habitat. One way in which the invaders might overcome this disadvantage is by associating with native taxa occupying a similar ecological niche. Here we used guppies ( Poecilia reticulata ) from a feral population in Mexico to test the prediction that exotic shoaling fish can associate with heterospecifics, and that they improve their foraging efficiency by doing so. Guppies have invaded the Mexican High Plateau and are implicated in the declines of many native topminnow (Goodeinae) species. We show that heterospecific associations between guppies and topminnows can deliver the same foraging benefits as conspecific shoals, and that variation in foraging gains is linked to differences in association tendency. These results uncover a mechanism enabling founding individuals to survive during the most vulnerable phase of an invasion and help explain why guppies have established viable populations in many parts of Mexico as well in every continent except Antarctica.

scholarly journals The dark side of facilitation: native shrubs facilitate exotic annuals more strongly than native annuals

NeoBiota ◽  
2019 ◽  
Vol 44 ◽  
pp. 75-93 ◽  
Author(s):  
Jacob E. Lucero ◽  
Taylor Noble ◽  
Stephanie Haas ◽  
Michael Westphal ◽  
H. Scott Butterfield ◽  
...  
Keyword(s):  
Biological Invasions ◽  
Exotic Species ◽  
Plant Community ◽  
Ecosystem Function ◽  
Foundation Species ◽  
Desert Ecosystem ◽  
Dark Side ◽  
Positive Interactions ◽  
Annual Plant ◽  
Exotic Invaders

Positive interactions enhance biodiversity and ecosystem function, but can also exacerbate biological invasions. Facilitation of exotic invaders by exotic foundation species (invasional meltdown) has been studied extensively, but facilitation of exotic invaders by native foundation species has attracted less attention. Specifically, very few studies have examined the extent that native foundation species facilitate native and exotic competitors. Understanding the processes that mediate interactions between native and exotic species can help explain, predict, and improve management of biological invasions. Here, we examined the effects of native foundation shrubs on the relative abundance of the annual plant community – including native and exotic taxa – from 2015–2018 in a desert ecosystem at Carrizo Plain National Monument, California, USA (elevation: 723 m). Shrub effects varied by year and by the identity of annual species, but shrubs consistently enhanced the abundance of the annual plant community and facilitated both native (n=17 species) and exotic (n=4 species) taxa. However, at the provenance level, exotic annuals were facilitated 2.75 times stronger in abundance than native annuals, and exotic annuals were always more abundant than natives both near and away from shrubs. Our study reaffirms facilitation as an important process in the organisation of plant communities and confirms that both native and exotic species can form positive associations with native foundation species. However, facilitation by native foundation species can exacerbate biological invasions by increasing the local abundance of exotic invaders. Thus, the force of facilitation can have a dark side relevant to ecosystem function and management.

Feral future: the untold story of Australia's exotic invaders

2003 ◽  
Vol 40 (10) ◽  
pp. 40-5797-40-5797
Keyword(s):  
Exotic Invaders

Exotic Invaders Threaten Pollination Services in Australia

2006 ◽  
Vol 17 (6) ◽  
pp. 276-278
Author(s):  
Louise Lawrence ◽  
Denis Anderson
Keyword(s):  
Pollination Services ◽  
Exotic Invaders

Are exotic invaders less susceptible to native predators? A test using native and exotic mosquito species in New Zealand

2010 ◽  
Vol 53 (2) ◽  
pp. 307-317 ◽  
Author(s):  
Wan Fatma Zuharah ◽  
Philip John Lester
Keyword(s):  
New Zealand ◽  
Mosquito Species ◽  
Exotic Invaders

scholarly journals Valuing Wildlife at Risk from Exotic Invaders in Yellowstone Lake

2013 ◽  
Author(s):  
Todd L. Cherry ◽  
Jason F. Shogren ◽  
Peter Frykblom
Keyword(s):  
At Risk ◽  
Yellowstone Lake ◽  
Exotic Invaders

scholarly journals Exotic Plants of Northern Rocky Mountain Environmental Zones

1985 ◽  
Vol 9 ◽  
pp. 103-108
Author(s):  
Bryant Woods ◽  
Tad Weaver
Keyword(s):  
Rocky Mountains ◽  
National Park ◽  
Rocky Mountain ◽  
Exotic Plants ◽  
Exotic Plant ◽  
Grand Teton National Park ◽  
Northern Rocky Mountains ◽  
Present Distribution ◽  
Scientific Value ◽  
Exotic Invaders

The Rocky Mountain exotic plant project is designed to determine (1) what exotics are capable of invading disturbed sites in major vegetational (environmental) zones of the Northern Rocky Mountains and (2) whether they are capable of invading near-climax closed vegetation in these zones. As an accessory activity we are determining (3) what natives are invading the same disturbed zones since we hope to find, among them, species likely to be successful on these sites and therefore species that might competitively exclude exotic invaders. A second accessory project of interest to managers, but with less immediate scientific value, was designed to (4) record the present distribution of major weeds along roadsides of Grand Teton National Park as they were recorded in Glacier during 1983-84.

Invasion or retreat? The fate of exotic invaders on the northern prairies, 40 years after cattle grazing

Plant Ecology ◽  
2012 ◽  
Vol 213 (8) ◽  
pp. 1251-1262 ◽  
Author(s):  
Peter A. Sinkins ◽  
Rafael Otfinowski
Keyword(s):  
Cattle Grazing ◽  
Exotic Invaders

scholarly journals Exotic invaders of the meso-oligohaline zone of estuaries in the Netherlands: why are there so many?

1998 ◽  
Vol 52 (3-4) ◽  
pp. 393-400 ◽  
Author(s):  
Wim J. Wolff
Keyword(s):  
The Netherlands ◽  
Exotic Invaders
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