●Soil erosion resulted in homogenization of bacterial communities in the watershed.●Microbial community heterogeneity among erosion sites made soil tracing possible.●Assembly process results showed that the trackin...●Soil erosion resulted in homogenization of bacterial communities in the watershed.●Microbial community heterogeneity among erosion sites made soil tracing possible.●Assembly process results showed that the tracking results can achieve high precision.●Dryland was the main source of sediment deposition based on the result of FEAST.Sediment source tracing can accurately provide a theoretical basis for controlling soil erosion effectively,by identifying the most serious types of land use.Traditional sediment tracing methods are based on physical,chemical,biological,and composite fingerprinting,which have not included microbes.As high-throughput sequencing becomes more prevalent,microorganisms can provide more information than what we think.Thus,whether the microorganism can also be used as a special fingerprint factor for sediment source identification during soil erosion,we have tested it by using microbial source tracking tool FEAST to quantify the microbe contribution from five types of eroded land(including dryland,urban,paddy field,forest and grassland)to the depositional areas(Niubitan)in the Yuanjiang basin.The source microbial community in the erosive area was heterogeneous,and assembly process analysis further demonstrated that the source tracking results could reach higher accuracy.The results of FEAST showed that dryland(35.50%),urban(17.21%),paddy field(8.14%),and forest(1.07%)were the major contributors to Niubitan.Our results follow the general soil erosion rules and prove its validity.Taken together,a new perspective is provided by these results for tracing sediment sources in erosion-sedimentary systems.展开更多
Autophagy,which means‘‘self-eating’’,is a process in which a portion of the cytosol is enclosed in a double-membrane autophagosome and delivered to the hydrolytic vacuole/lysosome for recycling(Fig.1).Bulk degrada...Autophagy,which means‘‘self-eating’’,is a process in which a portion of the cytosol is enclosed in a double-membrane autophagosome and delivered to the hydrolytic vacuole/lysosome for recycling(Fig.1).Bulk degradation by autophagy provides energy and materials for cell survival under various stress conditions such as starvation and energy deprivation.Autophagy also has a scavenging function展开更多
基金The National Natural Science Foundation of China provided funding for this project(U19A2047).
文摘●Soil erosion resulted in homogenization of bacterial communities in the watershed.●Microbial community heterogeneity among erosion sites made soil tracing possible.●Assembly process results showed that the tracking results can achieve high precision.●Dryland was the main source of sediment deposition based on the result of FEAST.Sediment source tracing can accurately provide a theoretical basis for controlling soil erosion effectively,by identifying the most serious types of land use.Traditional sediment tracing methods are based on physical,chemical,biological,and composite fingerprinting,which have not included microbes.As high-throughput sequencing becomes more prevalent,microorganisms can provide more information than what we think.Thus,whether the microorganism can also be used as a special fingerprint factor for sediment source identification during soil erosion,we have tested it by using microbial source tracking tool FEAST to quantify the microbe contribution from five types of eroded land(including dryland,urban,paddy field,forest and grassland)to the depositional areas(Niubitan)in the Yuanjiang basin.The source microbial community in the erosive area was heterogeneous,and assembly process analysis further demonstrated that the source tracking results could reach higher accuracy.The results of FEAST showed that dryland(35.50%),urban(17.21%),paddy field(8.14%),and forest(1.07%)were the major contributors to Niubitan.Our results follow the general soil erosion rules and prove its validity.Taken together,a new perspective is provided by these results for tracing sediment sources in erosion-sedimentary systems.
基金supported by grants from the National Basic Research Program of China (2013CB910100)the National Science Foundation of China (31421002, 31561143001, 31225018)also by an International Early Career Scientist Grant from the Howard Hughes Medical Institute
文摘Autophagy,which means‘‘self-eating’’,is a process in which a portion of the cytosol is enclosed in a double-membrane autophagosome and delivered to the hydrolytic vacuole/lysosome for recycling(Fig.1).Bulk degradation by autophagy provides energy and materials for cell survival under various stress conditions such as starvation and energy deprivation.Autophagy also has a scavenging function
