生境破碎化是生态学和保护生物学研究领域中的热点问题。明确生境破碎化对大熊猫空间利用的影响机制，对科学有效地开展栖息地保护与质量评价具有重要意义。但受制于传统理论及方法，大多数生境破碎化研究仅依靠景观格局指数的计算分析，或者借助于物种生境选择特征来探讨破碎化对物种的影响，没有考虑景观格局-生态过程的耦合关系，因而无法回答‘什么样的破碎化格局会对动物造成显著影响’这一经典问题。“源-汇”景观理论从格局和过程出发，将传统意义上的景观赋予过程含义，通过分析源汇景观在空间上的平衡来探讨影响生态过程的机理，被认为是研究景观格局-生态过程耦合的有效途径。本研究拟应用“源-汇”景观理论，量化大熊猫生境的功能破碎化特征，构建栖息地“源-汇”景观动态模型，并与大熊猫空间利用动态模型进行耦合，分析生境破碎化格局对大熊猫空间利用的影响机制及阈值效应，推动大熊猫栖息地生态学理论及栖息地有效保护与廊道建设科学发展。

Habitat fragmentation has become a topical issue in ecology and conservation biology. Understanding how habitat fragmentation affecting wildlife’s space use will promote effective management and critical assessment of wildlife habitats. However, most fragmentation studies relied solely on landscape pattern analysis or species niche traits, without Integrating of landscape pattern and ecological processes, to make inference on ecological consequences of habitat fragmentation, and therefore could not answer the question of how fragmentation patterns affect wildlife significantly. With the rapid development of landscape ecology, source-sink landscape theory has become an effective approach integrating landscape pattern and ecological processes. Originated from ecological-balancing theory, source-sink landscape theory assigns ecological values to landscape structural elements and analyze the relation between patterns and processes. In this research, we will quantify the patterns of habitat fragmentation for giant pandas in Qinling Mts. based on source-sink landscape theory. We build a source-sink landscape dynamics model for giant pandas’ habitat and integrate with habitat utilization dynamics of giant pandas in the past 30-years. Through the model, we evaluate the threshold effects of habitat fragmentation on giant pandas, and therefore gain important mechanistic insights into the effects of habitat fragmentation on giant pandas, which would greatly improve the effectiveness of habitat management as well as corridor design for giant pandas.