scholarly journals Invasive species and habitat degradation in Iberian streams: an analysis of their role in freshwater fish diversity loss

2011 ◽  
Vol 21 (1) ◽  
pp. 175-188 ◽  
Author(s):  
Virgilio Hermoso ◽  
Miguel Clavero ◽  
Francisco Blanco-Garrido ◽  
José Prenda
Keyword(s):  
Invasive Species ◽  
Freshwater Fish ◽  
Habitat Degradation ◽  
Fish Diversity ◽  
Diversity Loss

scholarly journals Long Term Interactions of Native and Invasive Species in a Marine Protected Area Suggest Complex Cascading Effects Challenging Conservation Outcomes

Diversity ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 71
Author(s):  
Charalampos Dimitriadis ◽  
Ivoni Fournari-Konstantinidou ◽  
Laurent Sourbès ◽  
Drosos Koutsoubas ◽  
Stelios Katsanevakis
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
High Performance ◽  
Marine Protected Area ◽  
Habitat Degradation ◽  
Population Increase ◽  
Rocky Reef ◽  
Cascading Effects ◽  
High Level

Understanding the interactions among invasive species, native species and marine protected areas (MPAs), and the long-term regime shifts in MPAs is receiving increased attention, since biological invasions can alter the structure and functioning of the protected ecosystems and challenge conservation efforts. Here we found evidence of marked modifications in the rocky reef associated biota in a Mediterranean MPA from 2009 to 2019 through visual census surveys, due to the presence of invasive species altering the structure of the ecosystem and triggering complex cascading effects on the long term. Low levels of the populations of native high-level predators were accompanied by the population increase and high performance of both native and invasive fish herbivores. Subsequently the overgrazing and habitat degradation resulted in cascading effects towards the diminishing of the native and invasive invertebrate grazers and omnivorous benthic species. Our study represents a good showcase of how invasive species can coexist or exclude native biota and at the same time regulate or out-compete other established invaders and native species.

Native fish diversity alters the effects of an invasive species on food webs

Ecology ◽  
2010 ◽  
Vol 91 (10) ◽  
pp. 2965-2974 ◽  
Author(s):  
Michael P. Carey ◽  
David H. Wahl
Keyword(s):  
Invasive Species ◽  
Food Webs ◽  
Native Fish ◽  
Fish Diversity

Patterns in Freshwater Fish Diversity

2021 ◽  
Author(s):  
Peter van der Sleen ◽  
James S. Albert
Keyword(s):  
Freshwater Fish ◽  
Fish Diversity

Impacts of aquatic invasive species and land use on stream food webs in Kaua’i, Hawai’i.

2014 ◽  
Vol 20 (3) ◽  
pp. 252 ◽  
Author(s):  
Megan Layhee ◽  
Michael P. Marchetti ◽  
Sudeep Chandra ◽  
Tag Engstrom ◽  
Daniel Pickard
Keyword(s):  
Invasive Species ◽  
Food Webs ◽  
Introduced Species ◽  
Human Disturbance ◽  
Habitat Degradation ◽  
Community Change ◽  
Ecological Communities ◽  
Native Populations ◽  
Niche Area ◽  
Stream Food Webs

Anthropogenic disturbance is restructuring ecosystems and changing interactions within ecological communities. On the Hawaiʼian Islands, habitat degradation is linked to the establishment of invasive species; and together these stressors may lead to declining native populations and changes in food webs. In this study we employed stable isotopes to examine the structure of multiple Hawaiʼian stream food webs with varying levels of these stressors to illustrate interactions between native and non-native organisms that may represent drivers of community change. Limahuli stream contains all five species of native Hawaiʼian gobies, has a small number of introduced species, and minimal human disturbance. ʻOpaekaʼa, Hul¯eʼia and Kapaʼa streams are more heavily invaded than Limahuli and have greater human influence. We found increased species richness, increased trophic diversity, and increased total niche area in the more heavily invaded stream food webs relative to Limahuli. We also found non-native predatory species inhabiting top trophic positions in the three more heavily invaded streams and isotope mixing model estimates suggest that several species of non-natives have overlapping prey sources with native gobies in these sites. Lastly, we found that native stream organisms were nearly absent in ʻOpaekaʼa stream which also had the highest percent urban development of the streams sampled. Our results suggest significant trophic changes have occurred as the result of introduced species and possibly related to increased human disturbance.

Freshwater fish diversity hotspots for conservation priorities in the Amazon Basin

2020 ◽  
Vol 34 (4) ◽  
pp. 956-965 ◽  
Author(s):  
Céline Jézéquel ◽  
Pablo A. Tedesco ◽  
William Darwall ◽  
Murilo S. Dias ◽  
Renata G. Frederico ◽  
...  
Keyword(s):  
Freshwater Fish ◽  
Amazon Basin ◽  
Conservation Priorities ◽  
Fish Diversity

scholarly journals Implications of Dam Obstruction for Global Freshwater Fish Diversity

BioScience ◽  
2012 ◽  
Vol 62 (6) ◽  
pp. 539-548 ◽  
Author(s):  
Catherine Reidy Liermann ◽  
Christer Nilsson ◽  
James Robertson ◽  
Rebecca Y. Ng
Keyword(s):  
Freshwater Fish ◽  
Fish Diversity
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