The influence of low-intensity watershed development on the hydrology, geomorphology, physicochemistry and macroinvertebrate diversity of small coastal plains streams

Schneid, Brad P.; Anderson, Christopher J.; Feminella, Jack W.

doi:10.1016/j.ecoleng.2017.05.052

Cited by 11 publications

(8 citation statements)

References 60 publications

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“…; see also Schneid et al. ). Two additional basins (also surrounding clearwater streams) had impervious surface levels within the impacted range (10–25%) expected to show signs of impairment (Cowpen Creek, 16.9%; Wolf Creek, 11.3%; Schueler et al.…”

Section: Discussionmentioning

confidence: 87%

“…; see Schneid et al. ). The trend for these blackwater streams to have a higher percentage of forest in their basins may be responsible for the observed high density of macroinvertebrates (Benke et al.…”

Section: Discussionmentioning

confidence: 95%

“…The LULC parameters included the following: percent agriculture (%Ag), percent forest (%Forest), and percent impervious surface, delineated for each stream basin from 2009 aerial photographs of Baldwin County, with a resolution of 0.15 m (Schneid et al. ; see also Morrison ).…”

Section: Methodsmentioning

confidence: 99%

“…We developed rating curves to convert stage to Q for each site using observed Q-values and estimated values for high flow with Manning's equation (Leonard et al 2000;Raghunath 2007;Thomas and Nisbet 2007;Helms et al 2009). We also estimated the base flow index (Nathan and McMahon 1990) as the ratio of base flow to total flow; base flow was determined using a three-pass recursive digital filter: a forward, backward, and forward process of filtering out peak flows and estimating base flows (Nathan and McMahon 1990;Schneid et al 2017). Estimating base flow allowed characterization of storm event frequency, which we estimated as the flow level allowing connection to the floodplain; we defined this flow event as the frequency of time during which Q exceeded 5× the median Q (Q_fre5; Helms et al 2009).…”

Section: Methodsmentioning

confidence: 99%

“…We quantified basin land use/land cover (LULC) to identify the degree to which land use parameters differed among stream types. The LULC parameters included the following: percent agriculture (%Ag), percent forest (%Forest), and percent impervious surface, delineated for each stream basin from 2009 aerial photographs of Baldwin County, with a resolution of 0.15 m (Schneid et al 2017; see also Morrison 2010).…”

Section: Methodsmentioning

confidence: 99%

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Environmental and Fish Assemblage Contrasts in Blackwater and Clearwater Streams

et al. 2020

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We compared 15 blackwater and clearwater streams in coastal drainages of Alabama by quantifying fish assemblages and associated environmental conditions across multiple seasons and characterizing potential relationships using multivariate statistical approaches. Clearwater stream channels tended to be deeper, to have sandier substrates, and to have higher dissolved oxygen concentrations than blackwater streams. In contrast, blackwater streams showed higher dissolved organic carbon levels and higher benthic macroinvertebrate densities. Discriminant function analysis based on environmental and invertebrate data resulted in 90% discrimination between the two stream types. Nonmetric multidimensional scaling (NMDS) of seasonal fish assemblages indicated separation by stream type, with no overlap in fish assemblages of blackwater and clearwater streams in any season, and 12 (39%) of the 31 species captured were indicative of stream type. A suite of environmental and biological variables representing invertebrate density, discharge, stream size, water chemistry, and land use was correlated with NMDS axes separating fish assemblages by stream type. Fish traits were somewhat distinctive between stream types, as there were unique lie-in-wait predators and short-lived species in each stream type. A fourth-corner analysis indicated potential linkages between fishes preferring woody substrate and stream type, further suggesting that stream type may explain fish functional structure. These results emphasize the need to consider these coastal systems as biotically unique ecosystem types in conservation plans as well as to focus more attention on better understanding the diversity patterns in headwater streams within the Coastal Plains region.

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Section: Discussionmentioning

confidence: 87%

Section: Discussionmentioning

confidence: 95%

Section: Methodsmentioning

confidence: 99%