Ecosystems and Global Change Laboratory (LEMG-UFF), International Laboratory of Global Change (LINCGlobal), Biomass and Water Management Research Center (NAB-UFF), Niterói, Brazil.
Physical Geography Laboratory (LAGEF-UFF), Department of Geography, Graduate Program in Geography, Fluminense Federal University (UFF), Niterói, Brazil.
Nat Commun. 2022 Jul 13;13(1):4051. doi: 10.1038/s41467-022-31258-8.
A significant proportion of carbon (C) captured by terrestrial primary production is buried in lacustrine ecosystems, which have been substantially affected by anthropogenic activities globally. However, there is a scarcity of sedimentary organic carbon (OC) accumulation information for lakes surrounded by highly productive rainforests at warm tropical latitudes, or in response to land cover and climate change. Here, we combine new data from intensive campaigns spanning 13 lakes across remote Amazonian regions with a broad literature compilation, to produce the first spatially-weighted global analysis of recent OC burial in lakes (over ~50-100-years) that integrates both biome type and forest cover. We find that humid tropical forest lake sediments are a disproportionately important global OC sink of ~80 Tg C yr with implications for climate change. Further, we demonstrate that temperature and forest conservation are key factors in maintaining massive organic carbon pools in tropical lacustrine sediments.
很大一部分陆地初级生产力捕获的碳（C）被埋在湖泊生态系统中，而这些生态系统受到了全球范围内人为活动的极大影响。然而，在温暖热带地区，或者在应对土地覆盖和气候变化时，对于被高生产力雨林环绕的湖泊，以及对于湖泊中沉积有机碳（OC）的积累信息，我们知之甚少。在这里，我们结合了来自遥远的亚马逊地区 13 个湖泊的密集考察活动的新数据，以及广泛的文献综述，首次进行了全球范围内对最近（约 50-100 年）湖泊 OC 埋藏的空间加权分析，该分析综合了生物群落类型和森林覆盖度。我们发现，湿润热带森林湖泊的沉积物是一个非常重要的全球 OC 汇，约为 80TgCyr-1，这对气候变化有影响。此外，我们证明了温度和森林保护是维持热带湖泊沉积物中大量有机碳库的关键因素。
