DOI: 10.3724/SP.J.1003.2008.07168

Biodiversity Science (生物多样性) 2008/16:1 PP.1-7

Effects of island area on plant species distribution and conservation implications in the Thousand Island Lake region

Numerous human activities have resulted in landscape fragmentation, and dam construction is one of them that often leads to drastic changes in biodiversity and ecosystem functioning on local and regional scales. In this study, we investigated how island area size affected the distribution of plant species in the Thousand Island Lake region. Also, we compared several conservation scenarios for maximizing plant species diversity. We found 56 tree species and 79 shrub species in 74 islands that were surveyed. These islands and the tree and shrub species they contained were tabulated by island size and analyzed consequently. Our results showed that 11 tree species were affected by island area while 15 were not, and 30 in between being affected and unaffected. For shrubs, 24 species were unaffected, 16 were affected, and 39 species were in between being affected and unaffected to variability in island size. Comparing the cumulative numbers of tree, shrub, and all species in different scenarios of aggregating individual islands by small, medium, large, and mixed categories, respectively, we were able to examine how species richness changed with the increasing total area of habitat and which combination gave rise to the highest species richness. Our analysis revealed that, for a given total area of island habitat, mixing islands of different sizes gave rise to the highest cumulative plant species richness in terms of tree, shrub, or total species richness. The agglomeration of smaller islands resulted in the second highest species richness whereas large islands supported the lowest species richness for the same total area of habitat. Thus, our results suggest that islands of all sizes need to be considered for biodiversity conservation in the Thousand Island Lake region.

Key words:Thousand Island Lake region,landscape fragmentation,plant distribution,SLOSS,tree,shrub

ReleaseDate:2015-03-13 18:05:38

Baguette MG,Mennechez G,Petit S,Schtickzelle N(2003)Effect of habitat fragmentation on dispersal in the butterfly Proclossiana eunomia.Comptes rendus Biologies,326,200-209.

Baz A,Garcia-Boyero A(1996)The SLOSS dilemma:a butterfly case study.Biodiversity and Conservation,5,493-502.

Botsaris I(1996)The Biogeography of Terrestrial Molluscs on the Islands and Islets of Saronikos Gulf.PhD thesis,University of Athens,Athens.

Cagnolo L,Cabido M,Valladares G(2006)Plant species richness in the Chaco Serrano Woodland from central Argentim:ecological traits and habitat fragmentation effects.Biological Conservation,132,510-519.

Chen XY(陈小勇)(2000)Effects of habitat fragmentation on genetic structure of plan populations and implications for the biodiversity conservation.Acta Ecologica Sinica(生态学报),20,884-892.(in Chinese with English abstract).

Chen SH(陈水华),Wang YJ(王玉军)(2004)Nestcdness pattern of insular community assemblages and its applications.Chinese Journal of Ecology(生态学杂志),23(3),81-87.(in Chinese with English abstract).

Chon XY(陈小勇),Song YC(宋永昌)(2007)Types of damaged ecosystem and the critical factors leading to degradation.Resources and Environment in the Yangtze Basin(长江流域资源与环境),13,78-83.(in Chinese with English abstract).

Ding LZ(丁立仲),Lu JB(卢剑波),Xu GF(徐高福),Wu JG(邬建国)(2004)Effects of ecological protection and development on landscape pattern in the Thousand-Island Lake region,Zhejiang Province.Biodiversity Science(生物多样性),12,473-480.(in Chinese with English abstraet).

Gao ZX(高增祥),Chen S(陈尚),Li DM(李典谟),Xu RM(徐汝梅)(2007)Origin and essence of island biogeography and metapopulation theory.Acta Ecologica Sinica(生态学报),27,304-313.(in Chinese with English abstract).

Jiang CZ(江昌志)(2004)Nursery technology of Ormosia henryi.Forest Science and Technology(林业实用技术),9,26.(in Chinese).

Kahmen S,Poschlod P(2000)Population size,plant performance,and genetic variation in the rare plant Arnica montana the Rhon,Germany.Basic and Applied Ecology,1,43-51.

Li J(李静),Ye WH(叶万辉),Ge XJ(葛学军)(2005)The genetic consequences of habitat fragmentation on plant.Acta Scientiarum Naturalium Universitatis Sunyatseni(中山大学学报自然科学版),44(Suppl.),193-199.(in Chinese with English abstract).

Li ZY(李振宇),Xie Y(解焱)(2002)Invasive Alien Species in China(中国外来入侵种).China Forestry Publishing House,Beijing.(in Chinese).

Lichert J (2004)Habitat fragmentation effects on fitness of plant populations-a review.Journal for Nature Conservation,12,53-72.

Lomolino MV(2000)Ecology's most general,yet protean pattern:the species-area relationship.Journal of Biogeography,27,17-26.

Losos JB(1996)Ecological and evolutionary determinants of the species-area relation in Caribbean anoline lizards.Philosophical Transactions:Biological Sciences,351,847-854.

McNeill SE,Fairweather PG(1993)Single large or several small marine reserves?An experimental approach with seagrass fauna.Journal of Biogeography,20,429-440.

Qu CM(渠春梅),Han XG(韩兴国),Su B(苏波)(2000)Edge effects in fragmented forests:implications for design and management of natural reserves.Acta Ecologica Sinica(生态学报),20,160-167.(in Chinese with English abstract).

Qin FF(覃风飞),An SQ(安树青),Zhuo YN(卓元午),Xiang HJ(项华均),Zheng JW(郑建伟),Chert XL(陈兴龙)(2003)Effect of landscape fragmentation on plant population.Chinese Journal of Ecology(生态学杂志),22,43-48.(in Chinese with English abstract).

Terborgh J,Lopez L,Nufiez P,Rao M,Shahabuddin G,Orihuela G,Riveros M,Ascanio R,Adler GH,Lambert TD),Balbas L(2001)Ecological meltdown in predator-free forest fragments.Science,294,1923-1926.

Triantis KA,Vardinoyannis K,Tsolaki EP,Botsaris I,Lika K,Mylonas M(2006)Re-approaching the small island effect.Journal of Biogeography,33,914-923.

Virolainen KM,Suomi T,Suhonen J,Kuitunen M(1998)Conservation of vascular plants in single large and several small mires:species richness,rarity and taxonomic diversity.Journal of Applied Ecology,35,700-707.

Xiong GM(熊高明),Xie ZQ(谢宗强),Lai JS(赖江山),Shen GZ(申国珍),Zhao CM(赵常明)(2007)Vegetation and plant species richness on six pre-islands,the Three Gorges Reservoir.Biodiversity Science(生物多样性),15,533-541.(in Chinese with English abstract).

Xu GF(徐高福)(1999)Elementary report on benefits of forest protection and management during 40 years in Thousand-island Lake regions.Forest Resources Management(林业资源管理),5,27-29.(in Chinese).

Xu GF(徐高福)(2004)Effects of landscape fragmentation on biology diversity in Thousand-island Lake region.Forest Inventory and Planning(林业调查规划),29,156-161.(in Chinese).

Xu GF(徐高福)(2007)Situation and countermeasures on the management of forest ecological environment in Thousand-island Lake.Protection Forest Science and Technology(防护林科技),1,53-54,57.(in Chinese).

Xu GF(徐高福),Zhang LG(张立功),Yu JL(余觉来),Shao TY(邵德钰)(2005)Forest plant resources in Thousand-island Lake region and its eco-economical effects.Forest Inventory and Planning(林业调查规划),30(Suppl.),21-23.(in Chinese).

Zhang X(张欣),Xu GF(徐高福),Shen DW(沈栋伟),Gu YJ(顾泳洁),Gao H(高辉),Luo XH(罗小华),Chen XY(陈小勇)(2007)Maintenance and natural regeneration of Castanopsis sclerophylla populations on islands of Qiandao Lake region.Acta Ecologica Sinica(生态学报),27,425-431.(in Chinese with English abstract).