华南农业大学学报
華南農業大學學報
화남농업대학학보
JOURNAL OF SOUTH CHINA AGRICULTURAL UNIVERSITY
2010年
2期
82-87
,共6页
刘刚%区余端%李镇魁%黎孟昭%马旭东%苏志尧
劉剛%區餘耑%李鎮魁%黎孟昭%馬旭東%囌誌堯
류강%구여단%리진괴%려맹소%마욱동%소지요
冰雪灾害%区系分布类型%山地常绿阔叶林%车八岭国家级自然保护区
冰雪災害%區繫分佈類型%山地常綠闊葉林%車八嶺國傢級自然保護區
빙설재해%구계분포류형%산지상록활협림%차팔령국가급자연보호구
ice storm%areal-type%mountain evergreen broadleaved forest%Chebaling National Nature Reserve
研究了2008年年初南方冰雪冻雨灾害对车八岭常绿阔叶林不同区系的冠层植被所造成的影响.结果显示,研究样地内温带分布的乔木受损比例高于热带分布的乔木受损比例.X~2检验说明不同区系间的冠层乔木个体受损比例差异显著(P<0.01);东亚分布及其变型受损个体比例最小,热带亚洲至热带非洲分布及变型、东亚和北美间断分布及其变型、热带亚洲分布及其变型受损个体比例较大.冠层乔木都以重度受损为主,中度受损和轻度受损个体数都远小于前者.CCA多元分析显示,株数密度、平均胸高断面积、坡度、海拔各自对不同物种的受损乔木的分布有显著影响(Monte Carlo test,P=0.010 0).优势种米槠Castanopsis carlesii受损植株的分布与群落的平均胸高断面积显著正相关;亚优势种栲Castanopsis fargesii、鸭公青Neolitsea chuii、尾尖叶柃Eurya acuminata受损植株的分布与坡度显著负相关;亚优势种荷木Schima superb与海拔显著正相关.总之,在相同的生境中能够占据林冠优势层的区系类型往往受灾更严重.
研究瞭2008年年初南方冰雪凍雨災害對車八嶺常綠闊葉林不同區繫的冠層植被所造成的影響.結果顯示,研究樣地內溫帶分佈的喬木受損比例高于熱帶分佈的喬木受損比例.X~2檢驗說明不同區繫間的冠層喬木箇體受損比例差異顯著(P<0.01);東亞分佈及其變型受損箇體比例最小,熱帶亞洲至熱帶非洲分佈及變型、東亞和北美間斷分佈及其變型、熱帶亞洲分佈及其變型受損箇體比例較大.冠層喬木都以重度受損為主,中度受損和輕度受損箇體數都遠小于前者.CCA多元分析顯示,株數密度、平均胸高斷麵積、坡度、海拔各自對不同物種的受損喬木的分佈有顯著影響(Monte Carlo test,P=0.010 0).優勢種米櫧Castanopsis carlesii受損植株的分佈與群落的平均胸高斷麵積顯著正相關;亞優勢種栲Castanopsis fargesii、鴨公青Neolitsea chuii、尾尖葉柃Eurya acuminata受損植株的分佈與坡度顯著負相關;亞優勢種荷木Schima superb與海拔顯著正相關.總之,在相同的生境中能夠佔據林冠優勢層的區繫類型往往受災更嚴重.
연구료2008년년초남방빙설동우재해대차팔령상록활협림불동구계적관층식피소조성적영향.결과현시,연구양지내온대분포적교목수손비례고우열대분포적교목수손비례.X~2검험설명불동구계간적관층교목개체수손비례차이현저(P<0.01);동아분포급기변형수손개체비례최소,열대아주지열대비주분포급변형、동아화북미간단분포급기변형、열대아주분포급기변형수손개체비례교대.관층교목도이중도수손위주,중도수손화경도수손개체수도원소우전자.CCA다원분석현시,주수밀도、평균흉고단면적、파도、해발각자대불동물충적수손교목적분포유현저영향(Monte Carlo test,P=0.010 0).우세충미저Castanopsis carlesii수손식주적분포여군락적평균흉고단면적현저정상관;아우세충고Castanopsis fargesii、압공청Neolitsea chuii、미첨협령Eurya acuminata수손식주적분포여파도현저부상관;아우세충하목Schima superb여해발현저정상관.총지,재상동적생경중능구점거림관우세층적구계류형왕왕수재경엄중.
The evergreen broadleaved forest ecosystem of Chebaling National Nature Reserve was severely damaged by the freezing rain and ice storm in the early 2008. Proportions of damaged stems were compared among 10 generic areal-types.The proportion of damaged stems belonged to temperate areal-type was higher than that to the tropical areal-type.X~2 test indicated that the proportions of damaged stems were significantly different (P<0.01)among the 10 generic areal-types. The damage proportion of the Eastern Asia areal-type was the smallest, whereas the damage proportion of the tropical Asia and Africa,Eastern Asia and North America,and tropical Asia areal-types were greater than others.All the generic areal-types were dominated by serious damage class,and the proportion of damaged stems in moderate damage class and slight damage class were far less than serious damage class.Canonical correspondance analysis(CCA)indicated that density,basal area,slope and elevation could significantly affect the distribution of damaged trees(Monte Carlo test,P=0.010 0).The distribution of damaged trees of the dominant species,Castanopsis carlesii,was positively correlated with basal area, while the three subdominant species,Castanopsis fargesii,Neolitsea chuii and Eurya acuminate,were negatively affected by slope, and the other subdominant species,Schima superba,was positively affected by elevation.In sum,the areal-type most seriously damaged was that in which species were dominant and took up the dominant layer of the forest canopy.