期刊
AQUATIC CONSERVATION-MARINE AND FRESHWATER ECOSYSTEMS
卷 31, 期 10, 页码 2673-2689出版社
WILEY
DOI: 10.1002/aqc.3672
关键词
climate change; conservation; biodiversity; freshwaters; Late Holocene; palaeolimnology
资金
- Ministerstwo Nauki i Szkolnictwa Wyzszego (Polish Ministry of Science and Higher Education) [DI2015017045]
This research analyzed the effects of climate warming and human pressure on the L. barbatus population. It demonstrated the historical presence of L. barbatus in Lake Kuznickie and suggested a positive impact of climate warming on the contemporary recovery of this charophyte. The study provides insights into appropriate management and conservation practices for lakes with L. barbatus populations.
In a time of rapid environmental changes, identification of the effects of climate warming on charophytes (Characeae, Charophyta) will enable the optimization of conservation measures, especially for extremely rare species. Lychnothamnus barbatus is one of the rarest charophytes worldwide, which has decreased in the number of occupied sites over the last century. However, the recolonization of former sites has been observed in recent years (e.g. Lake Kuznickie, Poland). The study aimed to analyse the effects of climatic changes and human pressure on the L. barbatus population. Three 30 cm sediment cores were collected from minimum, average, and maximum depths of L. barbatus occurrence to determine the past vegetation composition. Sediment cores were dated using the radioisotopes lead-210, caesium-137, and carbon-14. A spatial analysis of the lake catchment changes during the last 120 years was also conducted. The study demonstrated L. barbatus presence in Lake Kuznickie at the beginning of the 16th century. However, a sharp increase in the proportion of this species in the vegetation community occurred in the 19th century and during climate warming at the end of the Little Ice Age. Factors that significantly influenced the present occurrence of the L. barbatus population included improvement in water quality and the oospore bank deposited in the bottom sediments. This study is the first palaeoreconstruction in a modern lake dominated by L. barbatus. Based on the history of L. barbatus in Lake Kuznickie after the end of the Little Ice Age, the positive effect of climate warming on the contemporary recovery of this charophyte is postulated. The reaction of L. barbatus to climate warming appears to differ from commonly accepted scenarios for aquatic macrophytes because its recovery in the past and at present coincided with increases in air temperature. This research indicated the appropriate management and conservation practices for lakes with L. barbatus populations.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据