Florivory by the occupants of phytotelmata in flower parts can decrease host plant fecundity

Caio C.C.MISSAGIA ¹Maria Alice S.ALVES²

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作者信息

1. Graduate Program in Ecology and Evolution,Universidade do Estado do Rio de Janeiro,Pavilh?o Haroldo Lisboa da Cunha,Sala 224,Rua S?o Francisco Xavier,524,Maracan?,Rio de Janeiro 20550-013,Brazil
2. Department of Ecology,Universidade do Estado do Rio de Janeiro,Pavilh?o Haroldo Lisboa da Cunha,Sala 220,Rua S?o Francisco Xavier,524,Maracan?,Rio de Janeiro 20550-013,Brazil
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Abstract

Some types of plant accumulate liquid in their inflorescences creating phytotelmata.These envi-ronments protect the flowers against florivory,although they may be colonized by aquatic or semi-aquatic florivorous insect larvae,whose effects on the fitness of the plants remain unclear.We tested the hypothesis of floral antagonism by the occupants of phytotelmata,which predicts that florivory by the occupants of the phytotelmata represents a cost to the female fitness of the plant,reducing its fecundity.We manipulated experimentally the infestation by 3 florivores larvae species occupants of phytotelmata in inflorescences of Heliconia spathocircinata(Heliconiaceae)to test for negative direct trophic effects on the fecundity of the flowering and fruiting bracts.We found that the foraging of the hoverfly(Syrphidae)and moth(Lepidoptera)larvae in the inflorescences con-tributed to a decline in the fecundity of the plant.While the lepidopteran impacted fecundity when foraging in both flowering and fruiting bracts,the syrphid only affected the fruiting bracts,which indicates that the nectar and floral tissue are the principal resource exploited by the hoverfly.By contrast,soldier fly(Stratiomyidae)had a neutral effect on fecundity,while foraging in flowering or fruiting bracts.These findings corroborate our hypothesis,that herbivory by the larval occupants represents cost to the host plant having phytotelmata.The negative influence of this foraging on plant fecundity will nevertheless depend on the consequences of the exploitation of resources,which vary considerably in ephemeral habitats such as the phytotalmanta of flower parts.

Key words

Atlantic forest/Brazil/florivory/frugivory/Heliconia/water-held plants

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基金项目

Brazilian Coordination for Higher Education Personnel Training(CAPES:Coordena-o de Aperfei-oamento de Pessoal de Nível Super()

a doctoral research scholarship(this study was financed in part by CAPES)(Finance Code 001)

Rio de Janeiro State Research Foundation(FAPERJ:Funda-o Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro(DSC-10 process E_01/201.955/2017)

research of M.A.S.A(CNE processes E-26/203191/2015)

research of M.A.S.A(E-26/202.835/2018)

Brazilian National Research Council(CNPq:Conselho Nacional de Desenvolvimento Científico e Tecnológico)provided M.A.S.A.with(PQ processes 305798/2014-6)

Brazilian National Research Council(CNPq:Conselho Nacional de Desenvolvimento Científico e Tecnológico)provided M.A.S.A.with(306.579/2018-9)

出版年

2022

动物学报(英文版)

中国科学院动物研究所,中国动物学会

动物学报(英文版)

CSCDSCI

影响因子：0.198

ISSN：1674-5507

参考文献量98

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