Land-Based Impact of Nutrient Loads and Eutrophication on an Ancient Mediterranean Natural Lake

Hydrology

Filippo Giadrossich¹  Giuseppina Grazia Lai²  Silvia Pulina²  Bachisio Mario Padedda²  Cecilia Teodora Satta²  Antonella Lugliè² 

[1] Department of Agricultural Sciences, University of Sassari, Viale Italia 39, 07100 Sassari, Italy;Department of Architecture, Design and Urban Planning, University of Sassari, Via Piandanna 4, 07100 Sassari, Italy;

关键词: eutrophication;    watershed ecology;    lake management plans;    lake conservation;    monitoring;   

DOI  :  10.3390/hydrology9010007

来源: DOAJ

【 摘 要 】

In water management plans, all human impacts on the aquatic environment are quantified and evaluated. For this purpose, lake-related assessment methods of watersheds are needed. The aim of this study is to present the environmental condition along the watershed–lake continuum of Lake Baratz, located in the northeastern part of Sardinia. We provide a method to evaluate the impact of a small watershed area on the trophic state of this ancient Mediterranean natural lake. This study demonstrates the potentialities of coupling simple land structure-based models with empirical ones, allowing one to hierarchize, interpret, and predict the relationships among the watershed ecological unity and lake trophic conditions at multiple spatial and temporal scales. It also demonstrates how the impact of single and interacting nutrient stressors can have a different impact on the trophic status which, in particular, applies to autotrophs, constituting a key response in the ecosystem. We suggest that the stressor hierarchy should be considered as a way of prioritizing actions in the cost-effective implementation of conservation and management plans.

【 授权许可】

Unknown