Energy availability and habitat heterogeneity predict global riverine fish diversity

Nature ◽  
10.1038/34899 ◽  
1998 ◽  
Vol 391 (6665) ◽  
pp. 382-384 ◽  
Author(s):  
Jean-François Guégan ◽  
Sovan Lek ◽  
Thierry Oberdorff
Keyword(s):  
Habitat Heterogeneity ◽  
Fish Diversity ◽  
Energy Availability ◽  
Riverine Fish

scholarly journals First record of exotic alligator gar, Atractosteus spatula (Actinopterygii: Lepisosteiformes: Lepisosteidae), from Ganga River system, India: A possible threat to indigenous riverine fish diversity

2021 ◽  
Vol 51 (4) ◽  
pp. 385-391
Author(s):  
Ranjan Kumar Manna ◽  
Archisman Ray ◽  
Supriti Bayen ◽  
Tanushree Bera ◽  
Debashis Palui ◽  
...  
Keyword(s):  
Environmental Parameters ◽  
River System ◽  
First Record ◽  
Ganga River ◽  
Predatory Fish ◽  
Fish Diversity ◽  
Exotic Fish ◽  
Alligator Gar ◽  
Riverine Fish ◽  
Atractosteus Spatula

A new record of an exotic alligator gar, Atractosteus spatula (Lacepède, 1803), from an open wetland of the Ganga River was presented in this paper and discussed along with the environmental parameters. Entry of the exotic fish into the natural system was probably a result of uncontrolled ornamental fish trading. Considering threats of this predatory fish to become invasive and disturb riverine fish diversity, possible ways to avoid such risk have been discussed.

scholarly journals Topography, energy and the global distribution of bird species richness

2007 ◽  
Vol 274 (1614) ◽  
pp. 1189-1197 ◽  
Author(s):  
Richard G Davies ◽  
C. David L Orme ◽  
David Storch ◽  
Valerie A Olson ◽  
Gavin H Thomas ◽  
...  
Keyword(s):  
Species Richness ◽  
Habitat Heterogeneity ◽  
Bird Species ◽  
Geometric Constraints ◽  
Global Distribution ◽  
Current Evidence ◽  
Energy Availability ◽  
Relative Importance ◽  
Environmental Predictors ◽  
Predictor Models

A major goal of ecology is to determine the causes of the latitudinal gradient in global distribution of species richness. Current evidence points to either energy availability or habitat heterogeneity as the most likely environmental drivers in terrestrial systems, but their relative importance is controversial in the absence of analyses of global (rather than continental or regional) extent. Here we use data on the global distribution of extant continental and continental island bird species to test the explanatory power of energy availability and habitat heterogeneity while simultaneously addressing issues of spatial resolution, spatial autocorrelation, geometric constraints upon species' range dynamics, and the impact of human populations and historical glacial ice-cover. At the finest resolution (1°), topographical variability and temperature are identified as the most important global predictors of avian species richness in multi-predictor models. Topographical variability is most important in single-predictor models, followed by productive energy. Adjusting for null expectations based on geometric constraints on species richness improves overall model fit but has negligible impact on tests of environmental predictors. Conclusions concerning the relative importance of environmental predictors of species richness cannot be extrapolated from one biogeographic realm to others or the globe. Rather a global perspective confirms the primary importance of mountain ranges in high-energy areas.

scholarly journals A checklist of fish species from three rivers in northwestern Bangladesh based on a seven-year survey

2019 ◽  
Vol 11 (6) ◽  
pp. 13786-13794
Author(s):  
Imran Parvez ◽  
Mohammad Ashraful Alam ◽  
Mohammad Mahbubul Hassan ◽  
Yeasmin Ara ◽  
Imran Hoshan ◽  
...  
Keyword(s):  
Fish Species ◽  
Threatened Species ◽  
Fish Diversity ◽  
Freshwater Biodiversity ◽  
Management Plans ◽  
Northwestern Bangladesh ◽  
Conservation Concern ◽  
Riverine Fish ◽  
Three Rivers ◽  
Conservation And Management

Bangladesh is rich in freshwater biodiversity, but information on riverine fish diversity is lacking.  This study represents a complete list of fish species of Dhepa, Punarbhaba, and Atrai rivers of Bangladesh based on surveys carried out for seven years, from 2009 to 2016.  A total of 121 species belonging to 80 genera and 33 families were recorded, of which Cyprinidae was the most dominant family representing 24 species.  A total of 42 threatened species and 10 exotic species were collected during the survey.  This study highlights that Dhepa, Punarbhaba, and Atrai are critical habitats for many conservation-concern fish species, and reveals the need for developing suitable conservation and management plans for the future.

scholarly journals The Contribution of Different Restored Habitats to Fish Diversity and Population Development in a Highly Modified River: A Case Study from the River Günz

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1202 ◽  
Author(s):  
Joachim Pander ◽  
Juergen Geist
Keyword(s):  
Habitat Restoration ◽  
Fish Diversity ◽  
Population Development ◽  
Target Species ◽  
Endangered Fish ◽  
Barbus Barbus ◽  
High Conservation ◽  
Chondrostoma Nasus ◽  
River Dynamic ◽  
Riverine Fish

Despite of structural deficits, highly modified water bodies (HMWB) contain remnant populations of endangered fish that have high conservation value. Restoration in HMWBs underlies different principles when compared to natural rivers because of impaired river dynamic processes. The objective herein was to assess the contribution of restored habitats of the River Günz, Germany to fish diversity and restoration success of target species. All habitat restoration types, including bank habitats, fast flowing habitats with gravel, structured shallow water zones, nature like fish passes, and a former river course below a spillway were assessed. None of them comprised the full set of 27 fish species or size classes, indicating that the diversity and interlinkage of the restored habitats is most crucial to sustainable fish populations and high biodiversity. When considering the rheophilic target species Chondrostoma nasus and Barbus barbus, only fish passes and the former river course with their high flow current contributed much to their population development, particularly to young specimens <20 cm. The results of this study indicate that measures inside the main channel are unlikely to mitigate deficiencies in HMWBs concerning specialized riverine fish. Instead, interlinkage of a diversity of restoration measures and investment of resources for restoration in HMWBs into nature-like fish passes or former river courses below spillways with dynamically managed discharges seem most useful.

A self-organizing radial basis network for estimating riverine fish diversity

2013 ◽  
Vol 476 ◽  
pp. 280-289 ◽  
Author(s):  
Fi-John Chang ◽  
Wen-Ping Tsai ◽  
Hung-kwai Chen ◽  
Rita Sau-Wai Yam ◽  
Edwin E. Herricks
Keyword(s):  
Fish Diversity ◽  
Radial Basis Network ◽  
Radial Basis ◽  
Riverine Fish ◽  
Self Organizing

scholarly journals Riverine fish diversity varies according to geographical isolation and land use modification

2017 ◽  
Vol 7 (19) ◽  
pp. 7872-7883 ◽  
Author(s):  
Elizabeth Nicol ◽  
Jamie R. Stevens ◽  
Susan Jobling
Keyword(s):  
Land Use ◽  
Fish Diversity ◽  
Geographical Isolation ◽  
Riverine Fish

scholarly journals Riverine Fish of Murshidabad: A Study on River Ganga

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Suchismita Medda ◽  
Santi Ranjan Dey
Keyword(s):  
Distribution Pattern ◽  
West Bengal ◽  
Fish Fauna ◽  
Point Of View ◽  
Ganga River ◽  
Fish Diversity ◽  
Fish Ecology ◽  
Number Of Species ◽  
River Ganga ◽  
Riverine Fish

Murshidabad is a district of West Bengal, India and situated on the eastern bank of river Hooghly, a distributary of river Ganga. Although, many studies on fish ecology and fish systematics have been conducted largely to improve fisheries but fish diversity and their distribution pattern from conservation point of view have never been adequately addressed in the Ganga River. In this present study priority was given to prepare a consolidated list of fish fauna that have been found in the part of river Ganga which flows through the District Murshidabad. 74 species belonging to 9 orders and 24 families are found in the river Ganga of Murshidabad district. Family Cyprinidae representing highest number of species viz. 21. The order Cypriniformes is represented by 26 species followed by order Siluriformes containing 20 species.

Autophagy and ageing: implications for age-related neurodegenerative diseases

2013 ◽  
Vol 55 ◽  
pp. 119-131 ◽  
Author(s):  
Bernadette Carroll ◽  
Graeme Hewitt ◽  
Viktor I. Korolchuk
Keyword(s):  
Neurodegenerative Diseases ◽  
Energy Availability ◽  
Future Studies ◽  
Intracellular Degradation ◽  
Age Related ◽  
Autophagy Induction ◽  
Social Importance ◽  
Cellular Dysfunction ◽  
Autophagy Activity ◽  
Intense Research

Autophagy is a process of lysosome-dependent intracellular degradation that participates in the liberation of resources including amino acids and energy to maintain homoeostasis. Autophagy is particularly important in stress conditions such as nutrient starvation and any perturbation in the ability of the cell to activate or regulate autophagy can lead to cellular dysfunction and disease. An area of intense research interest is the role and indeed the fate of autophagy during cellular and organismal ageing. Age-related disorders are associated with increased cellular stress and assault including DNA damage, reduced energy availability, protein aggregation and accumulation of damaged organelles. A reduction in autophagy activity has been observed in a number of ageing models and its up-regulation via pharmacological and genetic methods can alleviate age-related pathologies. In particular, autophagy induction can enhance clearance of toxic intracellular waste associated with neurodegenerative diseases and has been comprehensively demonstrated to improve lifespan in yeast, worms, flies, rodents and primates. The situation, however, has been complicated by the identification that autophagy up-regulation can also occur during ageing. Indeed, in certain situations, reduced autophagosome induction may actually provide benefits to ageing cells. Future studies will undoubtedly improve our understanding of exactly how the multiple signals that are integrated to control appropriate autophagy activity change during ageing, what affect this has on autophagy and to what extent autophagy contributes to age-associated pathologies. Identification of mechanisms that influence a healthy lifespan is of economic, medical and social importance in our ‘ageing’ world.

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