NDLI: Environmental influences on fish assemblages in irrigation ponds

Content Provider	Springer Nature Link
Author	Mitsuo, Yoshito Tsuda, Hiroshi Takiguchi, Akira Senga, Yutaro
Copyright Year	2011
Abstract	Ponds are common features of the landscape and are considered important for freshwater biodiversity conservation. Although fish have a significant impact on the lentic ecosystems, the environmental factors that regulate fish assemblages in human-created water bodies, such as irrigation ponds, remain unclear. We evaluated the relationship between environmental factors and the fish assemblage structure in 31 ponds located in northern Japan. Species richness (range: 1–9) was positively correlated with the size of the inflow channel. Multivariate analyses revealed that the size of the inflow channel was a better predictor for species richness than lake morphology (surface area and maximum depth), vegetation coverage, water quality (turbidity, pH, DO, and EC), distance to the main channel, and distance to an adjacent pond. Species richness was significantly different between ponds with and without an inflow channel. Furthermore, three of the four most commonly observed species are thought to be relatively tolerant to low oxygen. Given that ponds have a relatively high local extinction rate resulting from exposure to stressful conditions, such as low oxygen and/or small population sizes, our results suggest that immigration from surrounding water bodies plays an important role in maintaining species richness of pond-dwelling fish.
Starting Page	473
Ending Page	482
Page Count	10
File Format	PDF
ISSN	13862588
Journal	Aquatic Ecology
Volume Number	45
Issue Number	4
e-ISSN	15735125
Language	English
Publisher	Springer Netherlands
Publisher Date	2011-08-10
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Freshwater fish Connectivity Isolation Species richness Ecosystems Freshwater & Marine Ecology
Content Type	Text
Resource Type	Article
Subject	Aquatic Science Ecology, Evolution, Behavior and Systematics

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