Removing riparian Rhododendron maximum in post-Tsuga canadensis riparian forests does not degrade water quality in southern Appalachian streams

2020 ◽  
pp. 143270
Author(s):  
Katherine J. Elliott ◽  
Chelcy Ford Miniat
Keyword(s):  
Water Quality ◽  
Tsuga Canadensis ◽  
Riparian Forests ◽  
Southern Appalachian ◽  
Rhododendron Maximum ◽  
Appalachian Streams

scholarly journals Water Quality and Exurbanization in Southern Appalachian Streams

2012 ◽  
pp. 91-106 ◽  
Author(s):  
Jackson R. Webster ◽  
Ernest F. Benfield ◽  
Kristen K. Cecala ◽  
John F. Chamblee ◽  
Carolyn A. Dehring ◽  
...  
Keyword(s):  
Water Quality ◽  
Southern Appalachian ◽  
Appalachian Streams

Strategies for coexistence in three species of net-spinning caddisflies (Trichoptera) in second-order southern Appalachian streams

1977 ◽  
Vol 55 (11) ◽  
pp. 1829-1840 ◽  
Author(s):  
Diane Malas ◽  
J. Bruce Wallace
Keyword(s):  
Particle Size ◽  
Vascular Plant ◽  
Distribution Patterns ◽  
Gut Contents ◽  
Dietary Composition ◽  
Particle Sizes ◽  
Southern Appalachian ◽  
Fine Particulate ◽  
Animal Material ◽  
Appalachian Streams

Three species of net-spinning caddisflies, Parapsyche cardis, Diplectrona modesta, and Dolophilodes distinctus were studied. Larvae of Dolophilodes are found at the lowest current velocities followed by Diplectrona, then Parapsyche, which prefer the higher velocities. Parapsyche larvae are most abundant on upper surfaces of stones while Diplectrona and Dolophilodes are found primarily on undersides of stones. These distribution patterns are probably related to capture net mesh dimensions which differ greatly for the three species, Parapsyche having the largest and Dolophilodes the smallest meshes. Significant correlations existed for mean foregut particle size and capture net mesh opening size between instars of all species within seasons, between instars of all species throughout the year, and between instars within species throughout the year. These correlations support the contention that particle size selection is an important aspect of feeding differences between species. There are large differences between mesh opening sizes of last-instar Dolophilodes and first- and second-instar Diplectrona larvae. However, based on mean particle size measurements of foregut contents, there is no corresponding gap in the spectrum of particle sizes used for food. Dietary composition also varied between species. Parapsyche consumed primarily animal material. Fine particulate detritus composed over 95% of Dolophilodes gut contents and Diplectrona consumed mostly vascular plant and detritus fragments in late instars and fine particulate detritus in early instars.

Effects of small changes in riparian forest complexity on aquatic insect bioindicators in Brazilian subtropical streams

2017 ◽  
Vol 68 (3) ◽  
pp. 519 ◽  
Author(s):  
A. E. Siegloch ◽  
R. Schmitt ◽  
M. Spies ◽  
M. Petrucio ◽  
M. I. M. Hernández
Keyword(s):  
Water Quality ◽  
Environmental Gradient ◽  
Functional Group ◽  
Riparian Forest ◽  
Aquatic Insect ◽  
Riparian Forests ◽  
Important Indicator ◽  
Positive Effects ◽  
Species Analysis ◽  
Protection Area

Riparian forests have positive effects on water quality and biodiversity. However, most studies have only tested the effects of distinct vegetation types or streams with and without forests, despite the fact that riparian forests differ in degrees of complexity. The aim of the present study was to test whether riparian forest complexity affected the composition and abundance of the Ephemeroptera, Plecoptera and Trichoptera (EPT) taxa across a small environmental gradient. We also measured whether EPT genera or feeding groups responded to changes in riparian forest complexity. The study was conducted in two protection areas (i.e. Lagoa do Peri Municipal Park, PERI; and the Permanent Protection Area of Ratones, RAT) of Santa Catarina Island, Brazil. Primary production increased in streams with lower canopy percentage, and EPT assemblages differed among streams with different riparian forest complexity. In RAT, the water quality and forest variables affected EPT composition; however, in PERI, only water quality variables were important. Indicator species analysis based on genera suggested Kempnyia (Plecoptera) and Zelusia (Ephemeroptera) to be indicative of streams with greater forest complexity, whereas Farrodes (Ephemeroptera) was significant in streams of intermediate riparian forest complexity; however, no one functional group dominated. The results of the present study show that small changes in riparian forest complexity influence the composition of EPT insects in subtropical streams.

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