气候变化领域集成服务门户(CCPortal): Effects of water level fluctuations on the trophic state of a connected lacustrine system (Southern Andes, Patagonia, Argentina): applicability of the CDOM method as a tool for monitoring of eutrophication

CCPortal

DOI	10.1007/s00027-024-01062-1
	Effects of water level fluctuations on the trophic state of a connected lacustrine system (Southern Andes, Patagonia, Argentina): applicability of the CDOM method as a tool for monitoring of eutrophication
	Gianello, Diamela; Reissig, Mariana; Perez, Gonzalo L.; Rechencq, Magali; De Stefano, Lucia G.; Queimalinos, Claudia
发表日期	2024
ISSN	1015-1621
EISSN	1420-9055
起始页码	86
结束页码	2
卷号	86 期号:2
英文摘要	Hydrological connectivity plays a central role in lake functioning and is strongly influenced by water level fluctuations (WLFs), which occur naturally or due to human activities and can induce changes in the trophic states of lakes. Traditionally, the trophic state has been assessed using the Trophic State Index (TSI), but recently, chromophoric dissolved organic matter (CDOM) has emerged as a new indicator of eutrophication. We conducted a 2-year seasonal survey in three interconnected Andean-Patagonian lakes (Argentina), with different hydrogeomorphic features and macrophyte cover, considering both low-water (LWP) and high-water (HWP) phases. We aimed to determine the influence of WLFs and macrophyte cover on TSI dynamics, and to evaluate the use of CDOM for monitoring the trophic state of these Andean-Patagonian lakes. TSI ranged from ultraoligotrophy to mesotrophy and showed significant changes between rainy and dry seasons, particularly in shallow lakes. WLFs were revealed to be an important regulatory factor in this connected system, since a pronounced differentiation of physicochemical variables was found among lakes during the LWP, and homogenization during the HWP. Submerged macrophytes strongly affected nutrient dynamics, especially nitrogen (N), and consequently TSI. During the LWP, nutrient release associated with macrophyte senescence resulted in elevated TSI values in the shallowest lake. During periods of macrophyte growth and higher hydrological connectivity, a dilution effect developed, with reduced TSI values. Strong positive correlations found between TSI and CDOM (a254) highlighted CDOM as a reliable indicator of TSI, even in ultra-oligotrophic lakes. The positive relationship of TSI-a355 suggests the potential use of optical satellites to estimate TSI, increasing spatial and temporal monitoring capabilities.
英文关键词	Hydrological connectivity; Water quality; Trophic State Index; Andean-Patagonian lakes; Ultraoligotrophy
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology
WOS类目	Environmental Sciences ; Limnology ; Marine & Freshwater Biology
WOS记录号	WOS:001187585900002
来源期刊	AQUATIC SCIENCES
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301821
作者单位	Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET); Universidad Nacional del Comahue; Universidad Nacional del Comahue
推荐引用方式 GB/T 7714	Gianello, Diamela,Reissig, Mariana,Perez, Gonzalo L.,et al. Effects of water level fluctuations on the trophic state of a connected lacustrine system (Southern Andes, Patagonia, Argentina): applicability of the CDOM method as a tool for monitoring of eutrophication[J],2024,86(2).
APA	Gianello, Diamela,Reissig, Mariana,Perez, Gonzalo L.,Rechencq, Magali,De Stefano, Lucia G.,&Queimalinos, Claudia.(2024).Effects of water level fluctuations on the trophic state of a connected lacustrine system (Southern Andes, Patagonia, Argentina): applicability of the CDOM method as a tool for monitoring of eutrophication.AQUATIC SCIENCES,86(2).
MLA	Gianello, Diamela,et al."Effects of water level fluctuations on the trophic state of a connected lacustrine system (Southern Andes, Patagonia, Argentina): applicability of the CDOM method as a tool for monitoring of eutrophication".AQUATIC SCIENCES 86.2(2024).