L. Roberts, C. Sayer, D. Hoare, M. Tomlinson, J. Holmes, D. Horne, Andrea Kelly
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Here, we compile monitoring, documentary, and archival records from a range of sources to extend our understanding of centennial‐\r\nscale lake ecosystem change and recovery from increasing salinity. We use a case\r\nstudy of the Thurne Broads shallow lake coastal wetland system (Broads National\r\nPark, UK), which has been subjected to multiple pressures of anthropogenic land\r\ndrainage and North Sea storm surges (primarily in 1938 and 1953 CE) that have\r\ninfluenced salinity. Although there are still periods with significant data gaps and\r\nthe interactions with eutrophication remain unclear, we demonstrate that historical\r\ndata sources can be used in combination to observe seasonal patterns and extend\r\nknowledge on past salinity change and macrophyte community structure back to\r\nthe 1800s. A demonstrable change in the ecosystem is observed after the sea flood\r\nof 1938 CE, when salinity levels in parts of the Thurne Broads were close, or\r\nequivalent, to seawater. With the added anthropogenic pressures of the late 1900s,\r\nthe system has failed to fully recover. Future management, whilst balancing the\r\nneeds of multiple users, should focus on the current large seasonal fluctuations in\r\nsalinity and the vulnerability of the system to future large salinity increases.","PeriodicalId":44089,"journal":{"name":"Geo-Geography and Environment","volume":null,"pages":null},"PeriodicalIF":1.7000,"publicationDate":"2019-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1002/GEO2.83","citationCount":"6","resultStr":"{\"title\":\"The role of monitoring, documentary and archival records for coastal shallow lake management\",\"authors\":\"L. Roberts, C. Sayer, D. Hoare, M. Tomlinson, J. Holmes, D. 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Here, we compile monitoring, documentary, and archival records from a range of sources to extend our understanding of centennial‐\\r\\nscale lake ecosystem change and recovery from increasing salinity. We use a case\\r\\nstudy of the Thurne Broads shallow lake coastal wetland system (Broads National\\r\\nPark, UK), which has been subjected to multiple pressures of anthropogenic land\\r\\ndrainage and North Sea storm surges (primarily in 1938 and 1953 CE) that have\\r\\ninfluenced salinity. Although there are still periods with significant data gaps and\\r\\nthe interactions with eutrophication remain unclear, we demonstrate that historical\\r\\ndata sources can be used in combination to observe seasonal patterns and extend\\r\\nknowledge on past salinity change and macrophyte community structure back to\\r\\nthe 1800s. 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The role of monitoring, documentary and archival records for coastal shallow lake management
The effective management and restoration of aquatic ecosystems rely on the establishment of “reference conditions,” defined as the conditions expected in the
absence of anthropogenic impacts, and require a thorough understanding of the
natural variability within a system. However, at least in Europe, most systematic
surveys post‐date the onset of human‐induced pressures on aquatic ecosystems,
and thus fail to capture earlier degradation to water chemistry and flora and fauna,
which were already advanced. Paleolimnological methods can be used to assess a
range of anthropogenic stressors, but variability within a system is often smoothed
to give long‐term patterns. Here, we compile monitoring, documentary, and archival records from a range of sources to extend our understanding of centennial‐
scale lake ecosystem change and recovery from increasing salinity. We use a case
study of the Thurne Broads shallow lake coastal wetland system (Broads National
Park, UK), which has been subjected to multiple pressures of anthropogenic land
drainage and North Sea storm surges (primarily in 1938 and 1953 CE) that have
influenced salinity. Although there are still periods with significant data gaps and
the interactions with eutrophication remain unclear, we demonstrate that historical
data sources can be used in combination to observe seasonal patterns and extend
knowledge on past salinity change and macrophyte community structure back to
the 1800s. A demonstrable change in the ecosystem is observed after the sea flood
of 1938 CE, when salinity levels in parts of the Thurne Broads were close, or
equivalent, to seawater. With the added anthropogenic pressures of the late 1900s,
the system has failed to fully recover. Future management, whilst balancing the
needs of multiple users, should focus on the current large seasonal fluctuations in
salinity and the vulnerability of the system to future large salinity increases.
期刊介绍:
Geo is a fully open access international journal publishing original articles from across the spectrum of geographical and environmental research. Geo welcomes submissions which make a significant contribution to one or more of the journal’s aims. These are to: • encompass the breadth of geographical, environmental and related research, based on original scholarship in the sciences, social sciences and humanities; • bring new understanding to and enhance communication between geographical research agendas, including human-environment interactions, global North-South relations and academic-policy exchange; • advance spatial research and address the importance of geographical enquiry to the understanding of, and action about, contemporary issues; • foster methodological development, including collaborative forms of knowledge production, interdisciplinary approaches and the innovative use of quantitative and/or qualitative data sets; • publish research articles, review papers, data and digital humanities papers, and commentaries which are of international significance.