生态环境学报 ›› 2026, Vol. 35 ›› Issue (5): 679-690.DOI: 10.16258/j.cnki.1674-5906.2026.05.002
陈煖杏1,2,3(
), 向云燕1,2,4, 廖敬1,2,3, 杨元征1,2, 俎佳星1,2,*(
)
收稿日期:2025-09-06
修回日期:2026-02-14
接受日期:2026-03-15
出版日期:2026-05-18
发布日期:2026-05-08
通讯作者:
*E-mail: 作者简介:陈煖杏(2001年生),女,硕士研究生,主要研究方向为遥感植被物候。E-mail: cxxfc123@163.com
基金资助:
CHEN Xuanxing1,2,3(
), XIANG Yunyan1,2,4, LIAO Jing1,2,3, YANG Yuanzheng1,2, ZU Jiaxing1,2,*(
)
Received:2025-09-06
Revised:2026-02-14
Accepted:2026-03-15
Online:2026-05-18
Published:2026-05-08
摘要:
草地生态系统是中国陆地生态系统中至关重要的组成部分,在维持生态系统平衡和功能方面发挥着不可替代的作用。该研究以中国草地生态系统为研究对象,基于2000-2022年GOSIF GPP数据集,系统分析了中国草地植被生长季峰值物候(Peak of Growing Season,POS)和总初级生产力最大值(GPPmax)的时空演变规律,并深入探讨了其对春季物候(Start of Growing Season,SOS)及气候因子(温度和降水)的响应机制。研究结果表明:在研究时段内,整个研究区域的POS呈现不显著的提前趋势,变化速率为0.03 d−1∙a−1;而GPPmax则表现出显著的增加趋势,斜率为0.029 g∙m−2∙d−1∙a−1(以C计)。从空间上看,研究区约有55.84%的像元表现为POS提前的趋势(显著占比为22.40%),约有78.85%的区域表现出GPPmax增加的趋势(显著占比为33.31%)。就驱动因素而言,SOS在POS的变化趋势中起主导作用,其影响显著超过气候因素,这一发现凸显了植被自身节律的联动效应对植被后期生长的关键作用。GPPmax的主控因子呈现显著的区域分异特征:在西部干旱半干旱区主要受SOS调控,青藏高原则以温度为主导因子,而东部干旱区的GPPmax主要受降水控制。未来在研究全球碳循环与植被物候变化中,必须同时重视气候因素和生物节律的双重影响。
中图分类号:
陈煖杏, 向云燕, 廖敬, 杨元征, 俎佳星. 中国草地峰值物候特征时空变化及其影响因素分析[J]. 生态环境学报, 2026, 35(5): 679-690.
CHEN Xuanxing, XIANG Yunyan, LIAO Jing, YANG Yuanzheng, ZU Jiaxing. Spatiotemporal Variation of Peak Phenology Metrics in China’s Grasslands and Analysis of Influencing Factors[J]. Ecology and Environmental Sciences, 2026, 35(5): 679-690.
图1 中国草地分布图 根据Wang et al.(2020)的研究将研究区分为西部干旱半干旱区、青藏高原、东部干旱区。本图基于国家地理信息公共服务平台下载,审图号为GS(2024)0650号;底图边界无修改。下同
Figure 1 Distribution of grasslands in China
图2 基于GOSIF GPP时序物候提取示意图 黑线表示基于logistic函数拟合后的GPP时序曲线,红线表示logistic函数拟合的GPP曲线导数;SOS表示春季物候,POS表示生长季峰值物候,GPP表示总初级生产力,POS对应的GPP为GPPmax。下同
Figure 2 Schematic diagram for phenological extraction of GOSIF GPP time series
图6 POS、GPPmax分别与影响因子(SOS、温度、降水)变化趋势的异同 PRE代表降水,TEM为温度;“+”表示正趋势,“?”表示负趋势
Figure 6 Similarities and differences in the trends of POS and GPPmax with influencing factors (SOS, temperature, precipitation)
图7 POS、GPPmax分别与影响因子(SOS、温度、降水)的偏相关空间格局
Figure 7 Partial Correlation Spatial Patterns of POS and GPPmax with influencing factors (SOS, temperature, precipitation)
图8 基于偏相关显著性水平识别出的POS与GPPmax的主控因子
Figure 8 The most significant factor controlling POS and GPPmax, according to the significance level of the partial correlation
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