Aquatic Ecosystem Health & Management最新文献

{"title":"Seasonal dynamics of microzooplankton communities in the Sea of Oman (Arabian Sea)","authors":"N. Aberle, S. Piontkovski","doi":"10.1080/14634988.2019.1617002","DOIUrl":"https://doi.org/10.1080/14634988.2019.1617002","url":null,"abstract":"Seasonal dynamics of microzooplankton and changes in environmental condition were analysed during a one-year field sampling campaign in the Sea of Oman at two different stations. Monsoon winds in this region cause distinct seasonality patterns with high primary productivity during the south-west monsoon in summer (June to October) and north-east monsoon periods in winter (November to March). Microzooplankton in the Sea of Oman showed several biomass peaks throughout the year. In general, higher biomass occurred during the south-west monsoon when compared to the north-east monsoon period with maxima of 190 µg C l−1at the inshore station Bandar Al-Khyran at 1m and 308 µg C l−1 at 10m water depth. At the offshore-station, peaks of 372 µg C l−1 (1m) and 256 µg C l−1 (20m) occurred during the south-west monsoon. A strong coupling between phytoplankton and microzooplankton was observed during monsoon periods but some microzooplankton peaked during inter-monsoon periods when chlorophyll concentration was low (Bandar Al-Khyran: 372 µg C l−1 at 1m and 196 µg C l−1, 10m; Offshore-station: 419 µg C l−1, 20 m). The initiation of phytoplankton blooms in the Sea of Oman was bottom-up controlled due to strong seasonal nutrient influx during south-west and north-east monsoon periods. Highest microzooplankton biomass occurred during monsoon periods with a dominance of Noctiluciphyceae and peaks of 7596 µg C l−1 at Bandar Al-Khyran (1m) and 5942 µg C l−1 (10m). Copepod nauplii, Amoebozoa and Larvacea contributed substantially to microzooplankton biomass throughout the year. Ciliophora contributed low proportion to the total microzooplankton biomass peaking both during monsoon and inter-monsoon periods. During the spring inter-monsoon, choreotrich ciliates (tintinnids) showed distinct peaks of 15.9 µg C l−1 at Bandar Al-Khyran (1m) and 17.7 µg C l−1 (10m) as well as 18.2 µg C l−1 at Offshore-station (20m). The interplay between bottom-up controlled primary production and top-down control mechanisms regulates the phenology patterns of specific microzooplankton groups in the Sea of Oman thus pointing at complex trophodynamic interactions at the lowermost foodweb level in this low-latitude ecosystem.","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"131 - 140"},"PeriodicalIF":0.8,"publicationDate":"2019-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2019.1617002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48682552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Transferring lessons learned from use of an ecosystem approach to restore degraded areas of North American Great Lakes to the Arabian Gulf","authors":"J. Hartig, M. Munawar, W. Hamza, F. AL-YAMANI","doi":"10.1080/14634988.2019.1622986","DOIUrl":"https://doi.org/10.1080/14634988.2019.1622986","url":null,"abstract":"Canada and USA have over a 100-year history of international cooperation on Great Lakes management. For over 30 years, federal, state, and provincial governments have successfully used locally-defined ecosystem approaches to develop and implement remedial action plans to restore beneficial uses impairments in 43 Great Lakes Areas of Concern. Each remedial action plan identifies use impairments/causes, remedial/preventive actions to restore uses, and implementation responsibilities and timeframes. Areas of concern are removed from the list when all uses are restored. Long-term efforts are needed to ensure sustainability through adaptive management. Shared resources, like the Arabian Gulf and Great Lakes, require collaboration among boundary countries to achieve common goals. A network of regional technical and governmental representatives could be established under or affiliated with the Regional Organization of Protecting Marine Environment to promote cleanup and ecosystem-based management of degraded areas of the Sea. It would have to be flexible, not prescriptive, science-based, action-oriented, and result in well recognized benefits to all partner countries. Workshops or conferences could be convened to address ecosystem issues. This network must be value-added and build capacity, and could eventually lead to use of locally-defined ecosystem approaches to develop cleanup plans for degraded areas of the Gulf, similar to Great Lakes Areas of Concern. Gulf countries, through the Regional Organization of Protecting Marine Environment and with support of a network, could then come together every three-five years to report on progress, identify research needs, celebrate successes, and establish next steps. Gulf I, II, and III conferences are building blocks for such a network. A logical next step would be to engage the Regional Organization of Protecting Marine Environment in the establishment of a network for ecosystem-based management and co-sponsorship of a Gulf IV Conference or other forum. In the spirit of cooperative learning, further exchanges of both scientific research and management practices would be beneficial between the Great Lakes and the Gulf.","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"149 - 159"},"PeriodicalIF":0.8,"publicationDate":"2019-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2019.1622986","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46282259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new tool to assess ecosystem health in large subtropical reservoirs: Development and validation of a Planktonic Index of Biotic Integrity","authors":"Juliana Pomari, D. Kane, R. A. R. Ferreira, M. Nogueira","doi":"10.1080/14634988.2019.1562837","DOIUrl":"https://doi.org/10.1080/14634988.2019.1562837","url":null,"abstract":"We developed and validated a Planktonic Index of Biotic Integrity for subtropical reservoirs to assess their ecosystem health. For this purpose, we analyzed the phytoplankton and zooplankton communities and determined reservoir trophic status in the Paranapanema River system (Southeast Brazil). Eleven dams were constructed in the main course of this river to supply hydropower plants. Three of the reservoirs are accumulation systems (i.e. with high water retention times), whereas the others are run-of-the-river systems. For the study the three larger reservoirs (Jurumirim, Chavantes and Capivara) were selected. Physical, chemical, and biological (phytoplankton and zooplankton) data were obtained in two sampling campaigns carried out in March (wet season) and October (dry season) of 2011. For each reservoir we sampled six stations, arranged on a gradient established between the lotic (Paranapanema River entrance) and lentic (dam) areas. According to the Trophic State Index for tropical/subtropical reservoirs, the sampling stations were categorized between ultraoligotrophic and mesotrophic. Four metrics achieved significant discrimination (out of a set of 20 candidate metrics). The individual metric scores were summed to provide a Planktonic Index of Biotic Integrity score, which ranged as Mesotrophic (4-9), Oligotrophic (10-14) and Ultraoligotrophic (15-20), corresponding to the classification of fair, good and excellent, respectively. Following the longitudinal sequence, Jurumirim was classified as Oligotophic (Good) and both Chavantes and Capivara as Ultraoligotrophic (Excellent). This study demonstrated that the Planktonic Index of Biotic Integrity is a potential tool for monitoring large subtropical reservoirs, as planktonic organisms are sensitive to environmental changes and this index integrates distinct temporal and spatial scales.","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"15 - 29"},"PeriodicalIF":0.8,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2019.1562837","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48418705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temporal and spatial variations of coastal water quality in Sishili Bay, northern Yellow Sea of China","authors":"Zhijun Dong, Dongyan Liu, Yujue Wang, B. Di","doi":"10.1080/14634988.2018.1525264","DOIUrl":"https://doi.org/10.1080/14634988.2018.1525264","url":null,"abstract":"Different chemometric approaches were used to determine generic patterns in the temporal and spatial variations in the coastal water quality of the northern Yellow Sea off Yantai, China. Hierarchical cluster analysis grouped the 16 months into two periods (i.e. March-October and November-February), reflecting strong seasonality in the data, and grouped the 12 sampling sites into two clusters (i.e. outside Yantai Bay and inside Yantai Bay), based on similarities in water quality characteristics. Discriminant analysis gave the best results for data complexity reduction during temporal analysis, but not during spatial analysis. Discriminant analysis identified five significant parameters (water temperature, salinity, and concentrations of dissolved inorganic nitrogen, dissolved inorganic phosphate and dissolved silicate) affording about 97.9% correct assignations in temporal analysis. In addition, principal component analysis identified three varifactors that explained 71% of temporal changes in the coastal water quality data set. Overall, the present study showed that these multivariate statistic methods were effective for evaluating temporal and spatial variations in the coastal water quality of Yantai. Water temperature and nutrient inputs may be major driving factors for the trophic status of these coastal waters. Low variances in spatial patterns of water quality parameters of Yantai were mostly related to the unrestricted water exchange between Sishili Bay and the Yellow Sea.","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"30 - 39"},"PeriodicalIF":0.8,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2018.1525264","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43630924","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Detection of spatial and temporal hydro-meteorological trends in Lake Michigan, Lake Huron and Georgian Bay","authors":"A. Javed, Vincent Cheng, G. Arhonditsis","doi":"10.1080/14634988.2018.1500850","DOIUrl":"https://doi.org/10.1080/14634988.2018.1500850","url":null,"abstract":"The Laurentian Great Lakes represent the largest freshwater basin on Earth, containing 21% of the world's surface fresh water by volume. Water level fluctuations are an on-going concern and have received considerable attention in the area. We present a trend analysis of meteorological (air temperature, cloud cover, and wind speed) and hydrological (precipitation, runoff, and evaporation) variables for Lake Michigan, Lake Huron, and Georgian Bay. Using the non-parametric Mann-Kendall test, our analysis identified significant upward trends in daily minimum air temperature, whereas daily maximum air temperature demonstrated weakly decreasing trends in space and time. Evaporation was found to be increasing from late spring until early fall and this pattern may be explained by the shortening of the ice/snow cover period, which results in faster warming of lake surface due to the induced variations in albedo feedback. Time-series analysis of the over-lake precipitation revealed mostly non-significant statistical trends. Recent temperature increases may have led to elevated winter runoff in the Great Lakes region, given that precipitation falls mainly as rain instead of snow. We also provide clear evidence of reduced cloud cover and wind speed. Our study offers critical insights into the patterns of within- and among-year variability of hydro-meteorological variables useful in elucidating the mechanisms that modulate water levels in the Great Lakes.","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"1 - 14"},"PeriodicalIF":0.8,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2018.1500850","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47569667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Investigation of trends in extreme significant wave heights in the South China Sea","authors":"Y. Luo, L. Zhu","doi":"10.1080/14634988.2018.1467194","DOIUrl":"https://doi.org/10.1080/14634988.2018.1467194","url":null,"abstract":"The focus of this study was the temporal and spatial variations of extreme significant wave heights and nearshore return-period wave heights in the South China Sea, based on the wave model and European Reanalysis-Interim data from 1979–2016. Measured buoy data were available from near Yongxing Island for comparison with the reanalysis data during the passage of typhoons. Annual maximum significant wave heights showed a statistically significant increasing trend over most of the South China Sea, whereas statistically insignificant decreasing or increasing trends were observed for seasonal maximum significant wave heights associated with the different characteristics of the typhoon events. Nonstationary generalized extreme value analysis was used to investigate the influence of nearshore extreme significant wave heights derived from the Simulating Waves Nearshore model at four offshore locations in the South China Sea. The fastest increase of 100-year return significant wave heights was found to be 0.0033 m yr−1 in the western South China Sea. The results show that, in recent decades, no significant variation trends can be found in return-period wave heights at nearshore of South China Sea, which may be related to tracks of intense typhoons in the region.","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"53 - 64"},"PeriodicalIF":0.8,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2018.1467194","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44457722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Macroinvertebrate assemblages from two sampling methods similarly discriminated freshwater wetlands with different ecosystem status in south Texas","authors":"Leah M. Mcintosh, Alejandro Fierro-Cabo, Jude A. Benavides","doi":"10.1080/14634988.2018.1505142","DOIUrl":"https://doi.org/10.1080/14634988.2018.1505142","url":null,"abstract":"Resacas of the lower Rio Grande River (secondary channels, distributaries, oxbow lakes) are vital freshwater wetlands under intense anthropogenic pressure. Many of these wetlands have their water levels tightly managed and some are being restored. Reliable bioassessment methods to effectively discriminate among resacas of differing ecological status are needed. Common components of bioassessments for aquatic ecosystems include surveys of biological communities, among which the macroinvertebrates are generally considered the most accurate. The macroinvertebrate community of resacas is virtually undocumented and various sampling methods have never been used in parallel. Here we used two popular sampling techniques (benthic corer and dip net), while producing the first portrait of the macroinvertebrate community inhabiting resacas. Despite sampling different invertebrate assemblage subsets, both methods discriminated among studied resacas in a similar manner; however, the corer presents several advantages including: 1) a much higher precision (based on coefficients of variation), 2) more adequate representation of an indicator species (invasive gastropod), and 3) clearer differences in functional feeding groups among resacas which constitutes an additional indicator metric.","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"65 - 76"},"PeriodicalIF":0.8,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2018.1505142","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48941678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diel patterns of zooplankton community structure in nearshore waters of different substrates off Tinggi and Sibu Islands, Malaysia, with special reference to copepods","authors":"E. Metillo, J. Nishikawa, Othman BH Ross, Teruaki Yoshida, F. Md. Yusoff, P. Kuppan, S. Ohtsuka, Mulyadi, H. Sekiguchi, T. Toda, S. Nishida","doi":"10.1080/14634988.2018.1505139","DOIUrl":"https://doi.org/10.1080/14634988.2018.1505139","url":null,"abstract":"The relationship between zooplankton community structure and selected environmental conditions was investigated by simultaneous two-day consecutive sampling in the waters overlying coral and sand sites off Sibu Island and a seagrass site off Tinggi Island, Johor, Malaysia. A total of 129 taxa were identified, 60 non-copepod taxa and 69 copepod species in all samples. Uni- and multi-variate analyses reveal distinct coral, sand, seagrass copepod assemblages with indicator copepod species and attributes of their size fractions. Small fraction (100–335 µm) samples contained greatest number of individuals, few rare species and were densest at onshore depths, and the opposite for large fraction (>335 µm) samples but were densest at nighttime and most species rich in the coral site at night. Higher species diversity at offshore stations is due likely to ecotonal effects of overlapping oceanic and nearshore communities. This study demonstrates the usefulness of uni- and multi-variate analyses in identifying patterns in zooplankton community structure in representative shallow tropical habitats, and the need for accurate zooplankton taxonomy, nighttime and daytime and onshore and offshore sampling, and size fractionation of samples.","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"102 - 86"},"PeriodicalIF":0.8,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2018.1505139","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42141309","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Temporal variabilities of δ13C and δ15N in an ecosystem from the Central-East Gulf of California: estimating trophic relationships","authors":"Martha Del Rio-Salas, Ángel Martínez-Durazo, R. Castro‐Longoria, M. Jara-Marini","doi":"10.1080/14634988.2018.1547581","DOIUrl":"https://doi.org/10.1080/14634988.2018.1547581","url":null,"abstract":"The foodweb of El Tóbari Lagoon (central-east Gulf of California) was studied for four seasons through the carbon and nitrogen isotopic characterization of primary producers, invertebrates, fish, birds and potential food sources. The range of δ13C measured was much wider for potential food sources than for consumers. Many organisms presented enrichments of δ13C and δ15N values. There was a clear trend toward increasing δ13C and δ15N from base organisms to top-predators in the four seasons. The isotopic and percentage of contribution data confirmed that suspended particulate organic matter and phytoplankton are the main organic source supporting the foodweb. Our results also imply the occurrence of a nutrient transfer from zooplankton to some invertebrates and juvenile fishes. Consumers were composed in four trophic levels, with trophic level 2 occupied by zooplankton and filter-feeders and trophic level 4 occupied by carnivorous fish and most bird species. Carnivorous fish exhibited dietary similarities by a considerable sharing of resources, which could be related to the abundance of possible prey, between invertebrates and juvenile fishes. Crustaceans and fish represented the main food sources of birds, although some birds showed more dietary variation (marine and offshore prey).","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"40 - 52"},"PeriodicalIF":0.8,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2018.1547581","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48040664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum","authors":"M. Veilleux, J. Midwood, C. Boston, Normand Lapointe, R. Portiss, M. Wells, S. Doka, S. J. Cooke","doi":"10.1080/14634988.2019.1594486","DOIUrl":"https://doi.org/10.1080/14634988.2019.1594486","url":null,"abstract":"","PeriodicalId":8125,"journal":{"name":"Aquatic Ecosystem Health & Management","volume":"22 1","pages":"103 - 103"},"PeriodicalIF":0.8,"publicationDate":"2019-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/14634988.2019.1594486","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49111485","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}