Species richness and similarity of the flora on four lajedos in Boa Nova, Bahia, Brazil  

作　　者：Morgana Maria DO CARMO BARBOSA Anderson FERREIRA PINTO MACHADO Andrea Karla ALMEIDA DOS SANTOS Raymundo JoséDE Sá-NETO Michele MARTINS CORRêA 

机构地区：[1]Graduate Program in Environmental Sciences,State University of Southwest Bahia,University Campus“Juvino Oliveira”,BR 415,km 04,45700-000,Itapetinga,Bahia,Brazil [2]Secretary of Education of the State of Bahia,Military Police College Eraldo Tinoco,Brasilia Avenue,273,Kadija,45650-120,Vitoria da Conquista,Bahia,Brazil [3]Mongoyós Herbarium,Multidisciplinary Institute in Health,Campus Anísio Teixeira,Federal University of Bahia,Rua Hormindo Barros,58,Bairro Candeias,45029-094,Vitoria da Conquista,Bahia,Brazil [4]Department of Natural Sciences,State University of Southwest Bahia,Estrada do Bem Querer,s/n,Bairro Candeias,45083-900,Vitoria da Conquista,Bahia,Brazil

出　　处：《Journal of Mountain Science》2023年第6期1526-1539,共14页山地科学学报（英文）

基　　金：the Coordena??o de Aperfei?oamento de Pessoal de Nível Superior(CAPES)(process number 88882.451229/2019-01)for the scholarship granted to the first author;to Programa de ApoioàPós-Gradua??o(PROAP)for the financial support provided for data collection。

摘　　要：The municipality of Boa Nova,in northeastern Brazil,is in an ecotone zone between the Caatinga and Atlantic Forest phytogeographic domains.The transition phytophysiognomy is seasonal forest and known locally as mata de cipó.In these phytophysiognomies there are lajedos,which are rock outcrops colonized by vegetation welladapted to extreme microclimatic variation and vegetation diversity is affected by the vegetation types of the surrounding areas.Due to the singularity of these environments and the relevance of floristic studies for conservation,this work aimed to identify the species richness and compare the similarity of the flora on four rock outcrops in Boa Nova.The flora was surveyed during exploratory walks along lajedos between 2016 and 2019.In total,162 species were identified on the Boa Nova outcrops.The flora has a composition and structure similar to semiarid outcrops,as well as endemic species that also occur in surrounding phytophysiomies.Despite the proximity,a similarity index revealed there is floristic dissimilarity between the areas.Nine new occurrences were recorded for the region,five species are threatened with extinction(Aosa gilgiana,Ficus cyclophylla,Hippeastrum stigmovittatum,Pleroma caatingae and Trixis pruskii),and 43 species are common in anthropogenic areas.This reinforces the importance of actions to conserve these areas.

关 键 词：ECOTONE FLORA Inselberg Rock outcrops SEMIARID SIMILARITY 

分 类 号：Q14[生物学—生态学]