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Book Assessment of the Biological Health of Streams in the Caloundra Shire Based on the Aquatic Macroinvertebrate Community

Download or read book Assessment of the Biological Health of Streams in the Caloundra Shire Based on the Aquatic Macroinvertebrate Community written by Queensland. Department of Natural Resources. Freshwater Biological Monitoring and published by . This book was released on 2000 with total page 33 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Assessment of the Ecological Health of Streams in the Bowen Broken Rivers Catchment Based on the Aquatic Macroinvertebrate Community and Water Quality and the Impact of Newlands Coal Mine on the Aquatic Environment

Download or read book Assessment of the Ecological Health of Streams in the Bowen Broken Rivers Catchment Based on the Aquatic Macroinvertebrate Community and Water Quality and the Impact of Newlands Coal Mine on the Aquatic Environment written by Queensland. Department of Natural Resources. Freshwater Biological Monitoring and published by . This book was released on 2001 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book An Assessment of the Ecological Condition of Streams and Rivers in Maroochy Shire Based on Macroinvertebrates as Biological Indicators

Download or read book An Assessment of the Ecological Condition of Streams and Rivers in Maroochy Shire Based on Macroinvertebrates as Biological Indicators written by and published by . This book was released on 1998 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Assessment of the Biological Health of Bulimba Creek Brisbane River Catchment Based on the Aquatic Macroinvertebrate Community

Download or read book Assessment of the Biological Health of Bulimba Creek Brisbane River Catchment Based on the Aquatic Macroinvertebrate Community written by Queensland. Department of Natural Resources. Freshwater Biological Monitoring and published by . This book was released on 2001 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Use of Macroinvertebrate Subsamples and Family Level Identification to Assess Environmental Impacts on Streams

Download or read book The Use of Macroinvertebrate Subsamples and Family Level Identification to Assess Environmental Impacts on Streams written by Elizabeth Marie Chase and published by . This book was released on 1999 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The species richness and diversity of pollution tolerant and intolerant macroinvertebrates provide an important tool to assess environmental impacts on streams. This study determined the efficacy of subsampling and family level identification in assessing water quality community structure and the biological health of the system. Fifty replicates of 100-, 300-, 500- 800- and 1000- organism subsamples were modeled using computer simulations based on actual Hess samples containing 1247 organisms (South Fork Boulder Creek) (SFB1) and 1234 organisms (California Creek). Ten replicates of California Creek were also handpicked to determine if there was bias in the computer model. Both handpicked and computer modeling gave similar results. South Fork Boulder 2 (SFB2) (2982 organisms) and South Fork Boulder 3 (SFB3) (4239 organisms) were also compared using the same computer modeling technique. Subsamples were compared using Hilsenhoffs species Biotic Index (HBI) and Family Biotic Index (FBI), taxa richness, feeding guild and taxa composition, Ephemeroptera, Plecoptera, Trichoptera (EPT) to Chironomidae ratio, EPT index, Shannon's diversity index and evenness, community loss index, %dominant taxon, and the EPA's Biotic Condition Score (%similarity to reference stream). HBI and FBI rated all subsample sizes the same: California Creek rated 2.45 and 4.16 (good); South Fork Boulder 1 rated 2.68 and 5.30 (fair), South Fork Boulder 2 rated 2.61 and 4.97 (fair), and South Fork Boulder 3 rated 2.63 and 5.0 (fair). Taxa richness (family and species) was significantly different at 100-organism subsamples in all streams and was also significantly different at the 300- organism level in the larger samples (SFB2 & 3). The ratio of shredders to total numbers remained relatively constant for all subsample sizes and all streams. The ratio of scrapers to filtering feeders differed among streams, however the groups were either under- or over-represented in all of the SFB's; California Creek had no filterers. EPT/Chironomidae ratio remained relatively constant for all subsample sizes and streams. The EPT index (family and species) was significantly different at 100-organism samples in all streams and was also significantly different at the 300-organism level in the larger samples (SFB2 & 3). Shannon's diversity index remained relatively constant for all subsample sizes and streams. Shannon's evenness measure rated all 100-organism subsamples as more similar than they actually were. The community loss index indicated there were significant differences in community structure at 100- and 300- organism subsamples for California Creek and SFB1 and also at 500-organism level in SFB2 and SFB3. %dominant taxon remained relatively constant for all subsample sizes and all streams at both family and species level. EPA's Biotic Condition Score (%similarity) indicated that at the 100-organism species level, all streams showed slight impairment and SFB1, SFB2 and SFB3 were also slightly impaired at the 300-organism level. In addition, SFB2 and SFB3 showed impairment at higher levels (SFB2 to 800- and SFB3 to 1000- organisms). Using the family BCS, California creek was not impaired at any level, SFB1 showed slight impairment at 100-organism level and SFB2 and SFB3 showed impairment at 100- and 300-organisms. This study indicates that family level metrics and indices give results similar to species level metrics and that subsampling at the 300-organism level could also be utilized. Using family level metrics and 300-organism subsamples would save considerable time, money and energy, which could be better utilized in more in-depth studies and better stream management"--Document.

Book Biological Assessment of River Health Using Macroinvertebrates

Download or read book Biological Assessment of River Health Using Macroinvertebrates written by Susan J. Nichols and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aquatic macroinvertebrates are commonly used biological indicators for assessing the health of freshwater resources. Compared to traditional methods, 'rapid' biological assessment methods provide a quicker turn-around of results, reduced costs and more easily interpreted results. The assumption underpinning many biological assessment methods is that the resulting macroinvertebrate sample is representative of the site at the scale to be assessed while still fulfilling the 'rapid' criteria of the bioassessment process. Complete enumeration of the invertebrates in the large samples that are usually collected is time consuming and costly, and would negate one of the 'rapid' components of bioassessment. Therefore, sub-sampling is often done by fixed time/count live-picking in the field or with preserved material using sample splitters in the laboratory. These methods are commonly used in conjunction with AUSRIVAS predictive models as part of Australia's National River Health Program. The macroinvertebrate sub-sample is expected to be adequate for assessing a site adequately in comparison to reference sites. This study examined the effects of sampling area, replication and sub-sampling methods on biological assessment results.

Book The Use of Biological Indicators for Assessing Stream Health and Relationships with Catchment Activities in the Richmond River NSW Australia

Download or read book The Use of Biological Indicators for Assessing Stream Health and Relationships with Catchment Activities in the Richmond River NSW Australia written by Susan Gaye Oeding and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Freshwater ecosystems are increasingly threatened by anthropogenic influences. As a result, biodiversity and water quality are declining. This thesis explored the use of biological indicators to determine the influence of land use activities on stream health. By comparing land use types and their associated aquatic biota, it was identified that land use plays a key role in community composition of both diatoms and macroinvertebrates. This research resolved some of the uncertainties in the understanding of freshwater aquatic ecosystem function, providing evidence crucial for effective management and to help mitigate the effects of anthropogenic activities on freshwater ecosystems.

Book The Effects of Drought on Community Structure of Stream Macroinvertebrates

Download or read book The Effects of Drought on Community Structure of Stream Macroinvertebrates written by Kate Roberts and published by . This book was released on 2000 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Natural stresses such as drought can cause changes in macroinvertebrate community composition over time. This study examines the relationship between low flows, macroinvertebrate habitat and the macroinvertbrate community. The sensitivity of AUSRIVAS biological monitoring methods to impacts associated with low flows are also examined. A flow threshold was used to define low flows and to test for changes in macroinvertebrate habitat and macroinvertebrate communities. Assessments of the biological condition of the macroinvertebrate community were performed using AUSRIVAS predictive models. Low flows reduced the available habitat for macroinvertebrates, thus altering resources for macroinvertebrates. However, macroinvertebrate abundance and community composition showed no significant response to the effects of low. AUSRIVAS assessments detected few reductions in biological condition of macroinvertebrate under low flow conditions. The threshold value used to define drought was useful for determining habitat change, but was appropriate for determinig levels at which changes to the macroinvertebrate community occur. Alternative methods such as a combination of low flow thresholds, low flow duration and channel characteristics may enable observations of biological impacts associated with low flow conditions.

Book An Assessment of Historical Changes in Aquatic Biota Water and Sediment Quality Within a Catchment at a Developing Urban Front

Download or read book An Assessment of Historical Changes in Aquatic Biota Water and Sediment Quality Within a Catchment at a Developing Urban Front written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Degradation of streams in urban-rural fringe regions occurs through complex interactions between hydrological, physical, chemical and biological mechanisms of the stream environment and surrounding landscape. Biological monitoring using macroinvertebrates may capture the complex and cumulative influences of land activity on the stream environment. The Salmon River catchment in the township of Langley, British Columbia, Canada straddles urban and rural environments in the Lower Fraser Valley. To date the Salmon River catchment has been subject to several environmental surveys. Following these earlier investigations, this study quantified relationships between the stream environment and changing land activity, across multiple scales, from 1975 to 2005, using macroinvertebrates as environmental integrators. Current and historical water, sediment, and macroinvertebrate information along with land use and land-cover evaluations were used to quantify relationships between the macroinvertebrate community and land activity in the catchment. Spatial and seasonal results for specific conductivity (a total dissolved ion indicator) and NO3−-N and PO43 (nutrient indicators) traced groundwater and overland inputs to the stream environment. Nitrate guideline exceedances occurred at groundwater-influenced sites. Elevated sediment trace metal concentrations and Zn guideline exceedances occurred mid-reach in the catchment. Peak total macroinvertebrate and sensitive taxa abundance occurred mid-reach in the catchment in 2005, while richness and proportional sensitive abundance peaks were seen at groundwater-influenced sites. The dominance of tolerant to moderately pollution tolerant taxa occurred throughout. Despite historical water quality concerns at groundwater-influenced sites, greater shifts in community composition occurred in headwaters regions. Patterns of land use and land cover changed in sensitive areas (i.e. above aquifer and in the headwaters). A greater number of correlat.

Book A Macroinvertebrate Bioassessment of Two Streams on Turnbull National Wildlife Refuge TNWR

Download or read book A Macroinvertebrate Bioassessment of Two Streams on Turnbull National Wildlife Refuge TNWR written by Sultan Mohammad Areshi and published by . This book was released on 2017 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This project focused on highly impacted streams at Turnbull National Wildlife Refuge, Cheney, WA to evaluate the health status and ecosystem integrity of the water bodies. Turnbull National Wildlife Refuge contains over 3,000 acres of wetlands, and provides high quality habitat for migrating and breeding waterfowl. However, these wetlands are impacted by both high nutrient levels (Davidson and Rule 2006) and invasive fish (Scholz et al. 2003). This project focused on stream sections of the Company Ditch (CD) and Pine Draw (PD) watersheds. Company Ditch historically had very high nutrient levels and low water quality. Water quality may be improving since closure of a nearby dairy operation in 2008. Pine Draw includes several springs and the only perennial stream habitat on TNWR. This stream has high densities of invasive brook stickleback, and experiences nutrient loading from an unknown source. Both streams were assessed using benthic macroinvertebrate surveys in 2007, 2008, 2010, 2011, 2013, and sampled again 2016. Benthic macroinvertebrate communities are widely used in monitoring ecosystem health. Physical habitat characteristics and water quality parameters were also measured. Water quality clearly improved in the Company Ditch during 2008-2011 following the closing of the dairy. Water quality has declined in one seasonal Pine Draw site, but remained more consistent in the permanent Pine Draw sites"--Page iv.

Book Biological Monitoring in Streams

Download or read book Biological Monitoring in Streams written by University of Western Australia. Aquatic Research Laboratory and published by . This book was released on 1987 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: