| Abstract: | Seven small tributary streams with drainage
areas ranging from 12.6 to 71.9 square miles, representative
of both limestone and freestone settings, in
the Lower Susquehanna River Basin were sampled for
algae, nutrients, water quality, habitat, land use, hydrology,
fish, and invertebrates. Nutrients, site
characteristics, and selected characteristics of the
invertebrate and fish communities known to influence
algal growth were compared to chlorophyll aconcentrations.
Nitrogen was not found limiting in these streams;
however, phosphorus may have been limiting in five of
the seven streams. Concentrations of chlorophyll ain
riffles increased with the degree of open canopy and as
bottom substrate reached the gravel/cobble size fraction.
These increased chlorophyll aconcentrations and
the substrate size in turn raised the levels of dissolved
oxygen in the streams. Freestone streams had
increased chlorophyll aconcentrations associated with
increases in percentage of omnivorous fish and in pH
and decreases in percentage of collector/gatherer
invertebrates. Concentrations of chlorophyll a in limestone
riffles decreased as the percentage of
omnivorous fish increased. Depositional chlorophyll a
concentrations increased as the Bank Stability Index
decreased and as the riffle velocity increased. Depositional
chlorophyll a concentrations increased in
limestone streams as collector/gatherer invertebrates
increased and as phosphorus concentrations
decreased. No relations were seen between chlorophyll
aconcentrations and land-use characteristics of
the basin.
In this study, there were too few sampling sites to
establish statistically based relations between algal
biomass and nutrient concentrations. Further study is
needed to generate data suitable for statistical
interpretation. |
| Genre: | USGS Numbered Series |
| ProdID: | 26342 |
| Citation Author: | Brightbill, Robin A.; Bilger, Michael D. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | v, 18 p. :ill., col. map ;28 cm. |
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| Citation Publisher: | U.S. Dept. of the Interior, U.S. Geological Survey ;
Branch of Information Services [distributor], |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 98-4144 |
| Citation Search Results Text: | Relation of algal biomass to characteristics of selected streams in the Lower Susquehanna River basin; 1998; WRI; 98-4144; Brightbill, Robin A.; Bilger, Michael D. |
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| Citation Year: | 1998 |
| Type: | citation/reference |
| Text: | Relation of algal biomass to characteristics of selected streams in the Lower Susquehanna River basin; 1998; WRI; 98-4144; Brightbill, Robin A.; Bilger, Michael D. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/usgs_thumb.jpg |
| URL (DOCUMENT): | http://pa.water.usgs.gov/reports/wrir98-4144.pdf |
| Date Other: | Fri, 1 Dec 2000 00:00 -0600 |
| Publisher: | U.S. Dept. of the Interior, U.S. Geological Survey ;
Branch of Information Services [distributor], |
