Nikolay P. Nezlin , SeungHyun Son , Christopher W. Brown , Prasanjit Dash , Caren E. Binding , Ashley K. Elgin , Andrea VanderWoude
{"title":"劳伦森五大湖内卫星衍生叶绿素的状态变化","authors":"Nikolay P. Nezlin , SeungHyun Son , Christopher W. Brown , Prasanjit Dash , Caren E. Binding , Ashley K. Elgin , Andrea VanderWoude","doi":"10.1016/j.jglr.2025.102573","DOIUrl":null,"url":null,"abstract":"<div><div>As a result of implementation of nutrient management following the binational Great Lakes Water Quality Agreement in 1972, the ecosystems within the Laurentian Great Lakes were gradually transforming to lower trophic regimes. This transformation dramatically accelerated in the late 1980s after the introduction of two invasive species of filter-feeding mussels of the genus <em>Dreissena.</em> We performed a detailed analysis of spatial and temporal patterns of this transformation using remotely sensed surface chlorophyll-<em>a</em> concentration (<em>Chl-a</em>) from the multi-satellite long-term Ocean Colour Climate Change Initiative (OC-CCI) dataset as a proxy of ecosystem state. We analyzed 25 years (1997–2022) of monthly composites covering most of the Great Lakes’ area detecting regime shifts in <em>Chl-a</em> employing an integrated approach combining Seasonal-Trend decomposition (STL) and Sequential T-test Analysis of Regime Shifts (STARS). The results identified the timings (shift points) when <em>Chl-a</em> stabilized at new lower trophic regimes, the magnitudes of <em>Chl-a</em> decrease across various lake regions and depths, and the changes in <em>Chl-a</em> seasonal cycles. In Lakes Michigan, Huron, and Ontario, the timings and magnitudes of regime shifts and vanishing of spring phytoplankton bloom suggest that dreissenid mussel presence was a primary driving factor of the observed transformation. We demonstrate that the OC-CCI dataset is a reliable source of information that enables the detection of these regime shifts in major lakes, with only minor effects of inconsistencies resulting from the biases between different satellites collecting data during different time periods.</div></div>","PeriodicalId":54818,"journal":{"name":"Journal of Great Lakes Research","volume":"51 3","pages":"Article 102573"},"PeriodicalIF":2.5000,"publicationDate":"2025-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Regime shifts in satellite-derived chlorophyll within the Laurentian Great Lakes\",\"authors\":\"Nikolay P. Nezlin , SeungHyun Son , Christopher W. Brown , Prasanjit Dash , Caren E. Binding , Ashley K. Elgin , Andrea VanderWoude\",\"doi\":\"10.1016/j.jglr.2025.102573\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>As a result of implementation of nutrient management following the binational Great Lakes Water Quality Agreement in 1972, the ecosystems within the Laurentian Great Lakes were gradually transforming to lower trophic regimes. This transformation dramatically accelerated in the late 1980s after the introduction of two invasive species of filter-feeding mussels of the genus <em>Dreissena.</em> We performed a detailed analysis of spatial and temporal patterns of this transformation using remotely sensed surface chlorophyll-<em>a</em> concentration (<em>Chl-a</em>) from the multi-satellite long-term Ocean Colour Climate Change Initiative (OC-CCI) dataset as a proxy of ecosystem state. We analyzed 25 years (1997–2022) of monthly composites covering most of the Great Lakes’ area detecting regime shifts in <em>Chl-a</em> employing an integrated approach combining Seasonal-Trend decomposition (STL) and Sequential T-test Analysis of Regime Shifts (STARS). The results identified the timings (shift points) when <em>Chl-a</em> stabilized at new lower trophic regimes, the magnitudes of <em>Chl-a</em> decrease across various lake regions and depths, and the changes in <em>Chl-a</em> seasonal cycles. In Lakes Michigan, Huron, and Ontario, the timings and magnitudes of regime shifts and vanishing of spring phytoplankton bloom suggest that dreissenid mussel presence was a primary driving factor of the observed transformation. We demonstrate that the OC-CCI dataset is a reliable source of information that enables the detection of these regime shifts in major lakes, with only minor effects of inconsistencies resulting from the biases between different satellites collecting data during different time periods.</div></div>\",\"PeriodicalId\":54818,\"journal\":{\"name\":\"Journal of Great Lakes Research\",\"volume\":\"51 3\",\"pages\":\"Article 102573\"},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2025-04-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Great Lakes Research\",\"FirstCategoryId\":\"93\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S038013302500067X\",\"RegionNum\":3,\"RegionCategory\":\"环境科学与生态学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"ENVIRONMENTAL SCIENCES\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Great Lakes Research","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S038013302500067X","RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENVIRONMENTAL SCIENCES","Score":null,"Total":0}
Regime shifts in satellite-derived chlorophyll within the Laurentian Great Lakes
As a result of implementation of nutrient management following the binational Great Lakes Water Quality Agreement in 1972, the ecosystems within the Laurentian Great Lakes were gradually transforming to lower trophic regimes. This transformation dramatically accelerated in the late 1980s after the introduction of two invasive species of filter-feeding mussels of the genus Dreissena. We performed a detailed analysis of spatial and temporal patterns of this transformation using remotely sensed surface chlorophyll-a concentration (Chl-a) from the multi-satellite long-term Ocean Colour Climate Change Initiative (OC-CCI) dataset as a proxy of ecosystem state. We analyzed 25 years (1997–2022) of monthly composites covering most of the Great Lakes’ area detecting regime shifts in Chl-a employing an integrated approach combining Seasonal-Trend decomposition (STL) and Sequential T-test Analysis of Regime Shifts (STARS). The results identified the timings (shift points) when Chl-a stabilized at new lower trophic regimes, the magnitudes of Chl-a decrease across various lake regions and depths, and the changes in Chl-a seasonal cycles. In Lakes Michigan, Huron, and Ontario, the timings and magnitudes of regime shifts and vanishing of spring phytoplankton bloom suggest that dreissenid mussel presence was a primary driving factor of the observed transformation. We demonstrate that the OC-CCI dataset is a reliable source of information that enables the detection of these regime shifts in major lakes, with only minor effects of inconsistencies resulting from the biases between different satellites collecting data during different time periods.
期刊介绍:
Published six times per year, the Journal of Great Lakes Research is multidisciplinary in its coverage, publishing manuscripts on a wide range of theoretical and applied topics in the natural science fields of biology, chemistry, physics, geology, as well as social sciences of the large lakes of the world and their watersheds. Large lakes generally are considered as those lakes which have a mean surface area of >500 km2 (see Herdendorf, C.E. 1982. Large lakes of the world. J. Great Lakes Res. 8:379-412, for examples), although smaller lakes may be considered, especially if they are very deep. We also welcome contributions on saline lakes and research on estuarine waters where the results have application to large lakes.