生态学报
生態學報
생태학보
ACTA ECOLOGICA SINICA
2009年
12期
6419-6428
,共10页
浮游甲壳动物%多样性%梁子湖%动态
浮遊甲殼動物%多樣性%樑子湖%動態
부유갑각동물%다양성%량자호%동태
pelagic crustacean%diversity%Lake Liangzi%dynamics
基于2006年8月至2008年3月对梁子湖浮游甲壳动物的采样调查,记录了该湖区浮游甲壳动物22种,隶属9科18属,其中枝角类(Cladocera)16种,桡足类(Copepoda)6种,包括9属新记录.物种多样性季节性动态变化明显:枝角类优势种在春、夏和秋冬季依次为透明溞(Daphnia hyalina,优势度Y = 0.80±0.01),小栉溞(Daphnia cristata,Y = 0.50±0.03)和长额象鼻溞(Bosmina longirostris,Y = 0.58±0.04);而桡足类优势种在夏、秋和冬春季依次为长江新镖水蚤(Neodiaptomus yangtsekiangensis,Y = 0.41±0.01)、近邻剑水蚤(Cyclops vicinus,Y = 0.46)和特异荡镖水蚤(Neutrodiaptomus incongruens,Y = 0.65±0.18).浮游甲壳类个体密度以春季最高((292±85) ind/L),夏、秋、冬季渐低(依次为(169±104)、(140±53)、(120±0) ind/L).物种多样性冬春季较低(物种数S≤12,丰富度指数D = 0.77和0.71,香农-威纳指数H = 1.79和1.45),夏秋季较高(S≥17,D = 0.98和0.88,H = 1.78和1.83).梁子湖浮游甲壳类动物多样性年际差异不显著,表明湖区环境条件较为优越、稳定.
基于2006年8月至2008年3月對樑子湖浮遊甲殼動物的採樣調查,記錄瞭該湖區浮遊甲殼動物22種,隸屬9科18屬,其中枝角類(Cladocera)16種,橈足類(Copepoda)6種,包括9屬新記錄.物種多樣性季節性動態變化明顯:枝角類優勢種在春、夏和鞦鼕季依次為透明溞(Daphnia hyalina,優勢度Y = 0.80±0.01),小櫛溞(Daphnia cristata,Y = 0.50±0.03)和長額象鼻溞(Bosmina longirostris,Y = 0.58±0.04);而橈足類優勢種在夏、鞦和鼕春季依次為長江新鏢水蚤(Neodiaptomus yangtsekiangensis,Y = 0.41±0.01)、近鄰劍水蚤(Cyclops vicinus,Y = 0.46)和特異盪鏢水蚤(Neutrodiaptomus incongruens,Y = 0.65±0.18).浮遊甲殼類箇體密度以春季最高((292±85) ind/L),夏、鞦、鼕季漸低(依次為(169±104)、(140±53)、(120±0) ind/L).物種多樣性鼕春季較低(物種數S≤12,豐富度指數D = 0.77和0.71,香農-威納指數H = 1.79和1.45),夏鞦季較高(S≥17,D = 0.98和0.88,H = 1.78和1.83).樑子湖浮遊甲殼類動物多樣性年際差異不顯著,錶明湖區環境條件較為優越、穩定.
기우2006년8월지2008년3월대량자호부유갑각동물적채양조사,기록료해호구부유갑각동물22충,대속9과18속,기중지각류(Cladocera)16충,뇨족류(Copepoda)6충,포괄9속신기록.물충다양성계절성동태변화명현:지각류우세충재춘、하화추동계의차위투명소(Daphnia hyalina,우세도Y = 0.80±0.01),소즐소(Daphnia cristata,Y = 0.50±0.03)화장액상비소(Bosmina longirostris,Y = 0.58±0.04);이뇨족류우세충재하、추화동춘계의차위장강신표수조(Neodiaptomus yangtsekiangensis,Y = 0.41±0.01)、근린검수조(Cyclops vicinus,Y = 0.46)화특이탕표수조(Neutrodiaptomus incongruens,Y = 0.65±0.18).부유갑각류개체밀도이춘계최고((292±85) ind/L),하、추、동계점저(의차위(169±104)、(140±53)、(120±0) ind/L).물충다양성동춘계교저(물충수S≤12,봉부도지수D = 0.77화0.71,향농-위납지수H = 1.79화1.45),하추계교고(S≥17,D = 0.98화0.88,H = 1.78화1.83).량자호부유갑각류동물다양성년제차이불현저,표명호구배경조건교위우월、은정.
Crustacean zooplanktons were seasonally sampled at 11 sites in Lake Liangzi from August, 2006 to March, 2008. Totally 22 crustacean species, which were composed of 16 Cladocera species and six Copepoda species, were identified. These species belong to nine families and 18 genera, nine of which were recorded for the first time in this lake area. Analysis of the species dominance index (Y), Shannon-Wiener diversity index (H), number of species (S), species richness index (D) and individual density (ind./L) revealed significant seasonal variation of the crustacean diversity. Daphnia hyalina (Y = 0.80±0.01), Daphnia cristata (Y = 0.50±0.03) and Bosmina longirostris (Y = 0.58±0.04) were the dominant Cladocera species in spring, summer and autumn-winter respectively. Neodiaptomus yangtsekiangensis (Y = 0.41±0.01), Cyclops vicinus (Y = 0.46) to Neutrodiaptomus incongruens (Y = 0.65±0.18) were the dominant Copepod species in summer, autumn and winter-spring respectively. Population density of Crustacean declined gradually from 292 (±85, S.D.) to 169 (±104), 140 (±53) and 120 (±0) through spring to winter. Similarly, species diversity remained low in winter and spring (S ≤ 12, D = 0.77 and 0.71, H = 1.79 and 1.45, respectively), but increased in summer and autumn (S ≥ 17, D = 0.98 and 0.88, H = 1.78 and 1.83, respectively). Further analysis indicated that species composition and diversity indexes of Crustacean community were relatively stable between 2006 and 2007 summers (August), as well as between 2007 and 2008 springs (March). Our results indicated that Lake Liangzi was in good condition for Crustacean species.
