According to one of the theses of optimal foraging theory,main prey species abundance in the hunting area is the main factor determining the diet and habitat choices of birds of prey.However other factors can also be ...According to one of the theses of optimal foraging theory,main prey species abundance in the hunting area is the main factor determining the diet and habitat choices of birds of prey.However other factors can also be important.The habitat structure influences the predators’diets as well.In this study we examined the influence of habitat structure on diet compositions of three species of birds:Long-eared Owl(Asio otus),Short-eared Owl(A.flammeus)and Common Kestrel(Falco tinnunculus).The study was carried out from 2007 to 2019 in a 48 km2area of the Crane’s Homeland Reserve,Moscow Region,Russia.The habitat structures of model species’hunting territories(ratio of different types of landscape elements)were classified in module"Semi-Automatic Classification Plugin"based on the QGIS.A boosted regression tree analysis identified that the share of the main prey species in the diet is primarily determined by the landscape structure of hunting territories.The largest share of Common Vole(Microtus arvalis)in birds’diet was determined by the shrubs area(15%of hunting area),the meadow area(75%),the habitat heterogeneity(70%)and the arable land area(5%).The same predictors determined the largest share of Root Vole(Microtus oeconomus):the shrubs area 25%,the meadow area 70%,and the arable land area 3%.The annual mean abundance of prey species did not determine their importance in the diet of birds of prey.Thus,the main prey abundance in the hunting area is not a determining factor for the formation of diet composition of birds of prey.展开更多
目的:探究桡动脉掌浅支腕横纹皮瓣游离移植修复手指软组织缺损的临床疗效。方法:选择2019年1月-2021年12月笔者医院收治的23例手指软组织缺损患者为研究对象,均给予桡动脉掌浅支腕横纹皮瓣游离移植修复治疗,术后随访6~12个月,评估疗效...目的:探究桡动脉掌浅支腕横纹皮瓣游离移植修复手指软组织缺损的临床疗效。方法:选择2019年1月-2021年12月笔者医院收治的23例手指软组织缺损患者为研究对象,均给予桡动脉掌浅支腕横纹皮瓣游离移植修复治疗,术后随访6~12个月,评估疗效、手指功能[Michigan手部功能问卷(Michigan hand outcomes quest ionnaire,MHQ)]及徒手肌力。结果:本组23例患者皮瓣均完全存活,手术优良率为100.00%,其中优14例,良9例;手术操作时间(3.16±0.21)h,术中出血量(83.27±6.59)ml,创面愈合时间(18.03±2.12)d;皮瓣两点分辨觉(7.41±0.43)mm。术后6个月MHQ评分:整体手功能(80.02±5.17)分,日常活动(78.94±6.13)分,工作情况(79.17±6.02)分,疼痛(77.02±6.13)分,外观(81.16±5.02)分,手功能满意程度(83.02±3.95)分。术后6个月肌力:4级5例,5级18例。随访期间出现术后创缘部分坏死1例,并发症发生率为4.35%。结论:桡动脉掌浅支腕横纹皮瓣游离移植修复手指软组织缺损疗效好,可有效恢复手指功能及徒手肌力,患者满意程度较高。展开更多
文摘According to one of the theses of optimal foraging theory,main prey species abundance in the hunting area is the main factor determining the diet and habitat choices of birds of prey.However other factors can also be important.The habitat structure influences the predators’diets as well.In this study we examined the influence of habitat structure on diet compositions of three species of birds:Long-eared Owl(Asio otus),Short-eared Owl(A.flammeus)and Common Kestrel(Falco tinnunculus).The study was carried out from 2007 to 2019 in a 48 km2area of the Crane’s Homeland Reserve,Moscow Region,Russia.The habitat structures of model species’hunting territories(ratio of different types of landscape elements)were classified in module"Semi-Automatic Classification Plugin"based on the QGIS.A boosted regression tree analysis identified that the share of the main prey species in the diet is primarily determined by the landscape structure of hunting territories.The largest share of Common Vole(Microtus arvalis)in birds’diet was determined by the shrubs area(15%of hunting area),the meadow area(75%),the habitat heterogeneity(70%)and the arable land area(5%).The same predictors determined the largest share of Root Vole(Microtus oeconomus):the shrubs area 25%,the meadow area 70%,and the arable land area 3%.The annual mean abundance of prey species did not determine their importance in the diet of birds of prey.Thus,the main prey abundance in the hunting area is not a determining factor for the formation of diet composition of birds of prey.
文摘目的:探究桡动脉掌浅支腕横纹皮瓣游离移植修复手指软组织缺损的临床疗效。方法:选择2019年1月-2021年12月笔者医院收治的23例手指软组织缺损患者为研究对象,均给予桡动脉掌浅支腕横纹皮瓣游离移植修复治疗,术后随访6~12个月,评估疗效、手指功能[Michigan手部功能问卷(Michigan hand outcomes quest ionnaire,MHQ)]及徒手肌力。结果:本组23例患者皮瓣均完全存活,手术优良率为100.00%,其中优14例,良9例;手术操作时间(3.16±0.21)h,术中出血量(83.27±6.59)ml,创面愈合时间(18.03±2.12)d;皮瓣两点分辨觉(7.41±0.43)mm。术后6个月MHQ评分:整体手功能(80.02±5.17)分,日常活动(78.94±6.13)分,工作情况(79.17±6.02)分,疼痛(77.02±6.13)分,外观(81.16±5.02)分,手功能满意程度(83.02±3.95)分。术后6个月肌力:4级5例,5级18例。随访期间出现术后创缘部分坏死1例,并发症发生率为4.35%。结论:桡动脉掌浅支腕横纹皮瓣游离移植修复手指软组织缺损疗效好,可有效恢复手指功能及徒手肌力,患者满意程度较高。
