منابع مشابه
Agriculture causes nitrate fertilization of remote alpine lakes
Humans have altered Earth's nitrogen cycle so dramatically that reactive nitrogen (Nr) has doubled. This has increased Nr in aquatic ecosystems, which can lead to reduced water quality and ecosystem health. Apportioning sources of Nr to specific ecosystems, however, continues to be challenging, despite this knowledge being critical for mitigation and protection of water resources. Here we use Δ...
متن کاملSmall lakes in big landscape: Multi-scale drivers of littoral ecosystem in alpine lakes.
In low nutrient alpine lakes, the littoral zone is the most productive part of the ecosystem, and it is a biodiversity hotspot. It is not entirely clear how the scale and physical heterogeneity of surrounding catchment, its ecological composition, and larger landscape gradients work together to sustain littoral communities. A total of 113 alpine lakes from the central Pyrenees were surveyed to ...
متن کاملMelting Alpine glaciers enrich high-elevation lakes with reactive nitrogen.
Alpine glaciers have receded substantially over the last century in many regions of the world. Resulting changes in glacial runoff not only affect the hydrological cycle, but can also alter the physical (i.e., turbidity from glacial flour) and biogeochemical properties of downstream ecosystems. Here we compare nutrient concentrations, transparency gradients, algal biomass, and fossil diatom spe...
متن کاملMelting Alpine Glaciers Enrich High-Elevation Lakes with Reactive Nitrogen
J A S M I N E E . S A R O S , * , † K E V I N C . R O S E , ‡ D A V I D W . C L O W , § V E R L I N C . S T E P H E N S , § A N D R E A B . N U R S E , † H E A T H E R A . A R N E T T , † J E F F E R Y R . S T O N E , | C R A I G E . W I L L I A M S O N , ‡ A N D A L E X A N D E R P . W O L F E ⊥ Climate Change Institute, University of Maine, Orono, Maine 04469, Department of Zoology, Miami Uni...
متن کاملThe role of solar UV radiation in the ecology of alpine lakes.
Solar ultraviolet radiation (UVR, 290-400 nm) is a crucial environmental factor in alpine lakes because of the natural increase of the UVR flux with elevation and the high water transparency of these ecosystems. The ecological importance of UVR, however, has only recently been recognized. This review, examines the general features of alpine lakes regarding UVR, summarizes what is known about th...
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ژورنال
عنوان ژورنال: Nature
سال: 1885
ISSN: 0028-0836,1476-4687
DOI: 10.1038/033195a0