Responses of remnant wetlands in the Sanjiang Plain to farming-landscape patterns
Responses of remnant wetlands in the Sanjiang Plain to farming-landscape patterns
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DOI：
10.1016/j.ecolind.2022.108542
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发表时间：
2022-01-10
影响因子：
6.9
通讯作者：
Liu, Yingnan
中科院分区：
文献类型：
--
作者：
Luo, Chunyu;Fu, Xiaoling;Liu, Yingnan
人类活动，特别是耕地开垦，对景观格局有很大影响。这一现象导致湿地面积急剧减少，湿地功能退化。为了解耕地景观格局变化对剩余湿地退化的影响，制定针对性强的治理措施，以三江平原农田-湿地镶嵌景观为例，探讨了耕地格局变化对剩余湿地土壤和植被相关指标的影响。探讨了不同缓冲区内耕地格局与土壤、植被指标的相关性。在利用土壤和植被指标构建剩余湿地综合退化指数的基础上，分析了耕地格局与剩余湿地综合退化的相关性。结果表明：1）5项土壤相关指标均低于自然湿地，9项植被相关指标均高于自然湿地; 2）在一定范围内，耕地格局变化引起的土壤和植被相关指标变化显著（P < 0.05），这些指标可作为IDRW模型的变量;湿地斑块的聚集度是IDRW模拟的主要景观指标（1995 - 2015年，三江平原湿地严重退化比例在2010年先下降后上升，轻度退化比例在2010年先上升后下降，表明湿地保护和恢复计划在2010年后取得了进展）。研究探讨了耕地格局对残馀湿地退化的影响，并建立了残馀湿地退化模拟方法，为今后耕地的湿地保护、恢复、退化监测和复垦规划提供参考。
Human activities, especially cultivated-land reclamation, substantially influence landscape patterns. This phenomenon leads to a sharp decrease in wetland areas and wetland function degradation. To understand the impact of changing landscape patterns of the cultivated land on remnant wetland degradation and to formulate highly targeted control measures, considering a farmland-wetland mosaic landscape in the Sanjiang Plain as an example, this study explored the response of soil- and vegetation-related indicators of remnant wetlands under the influence of changing cultivated land patterns. Correlations between cultivated land patterns and soil- and vegetation-indicators in different buffer zones of remnant wetland sample points were discussed. On the basis of modeling an index of the integrated degradation degree of remnant wetlands (IDRWs) using soil- and vegetationindicators, the correlation between cultivated land patterns and IDRW was analysed. The results showed that: 1) five soil-related indexes of remnant wetlands were lower than those of natural wetlands, and nine vegetationrelated indexes of remnant wetlands were higher than those of natural wetlands; 2) the variation in soil- and vegetarian-related indexes caused by changing cultivated land patterns in a certain range of remnant wetlands was significant (P < 0.05) and these indexes could potentially be used as variables to model IDRW; and 3) the aggregation degree of wetland patches was the main landscape index for IDRW simulation (from 1995 to 2015, the proportion of serious degradation of the Sanjiang Plain wetland first decreased in 2010 and then increased, and that of slight degradation first increased in 2010 and then decreased, indicating that wetland protection and restoration plans have shown progress after 2010). Our study discussed the impacts of cultivated land patterns on remnant wetland degradation and developed a simulation method of degraded remnant wetlands to provide a reference for the wetland protection, restoration, degradation monitoring, and reclamation planning for the cultivated lands in the future.