Seed rain under the canopies of female and male<i>Myrsine coriacea</i>, a pioneer tree from the Brazilian Atlantic forest

Begnini, Romualdo Morelatto; Castellani, Tânia Tarabini

doi:10.1017/s0266467413000400

Cited by 11 publications

(11 citation statements)

References 27 publications

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“…In this study, we found that seed deposition of S. guineense ssp. afromontanum was concentrated under F. natalensis, a result that is consistent with other studies that reported high densities of seeds beneath fruiting trees in savannas and abandoned pastures (Begnini & Castellani, 2013;Holl, 1998Holl, , 2002Slocum & Horvitz, 2000). In our case, this may be a consequence of the behavior of the most common consumer of S. guineense ssp.…”

Section: Discussionsupporting

confidence: 92%

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Do consumer‐mediated negative effects on plant establishment outweigh the positive effects of a nurse plant?

Fujita

Yamashina

2018

Ecology and Evolution

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Many studies demonstrated the importance of facilitative effect by nurse plant on seedling establishment. Few studies evaluated the negative effects of consumers on plant establishment under nurse plants by dealing with them during multiple demographic processes. We investigated the balance between the facilitative effect and negative effects of consumers during multiple demographic processes in Malawi in southeastern Africa. We chose Ficus natalensis as a nurse plant and compared it with three other microsites in tropical woodlands: Brachystegia floribunda (a dominant woodland species), Uapaca kirkiana (a woodland species), and a treeless site. We quantified the seed rain, postdispersal seed predation, germination, and seedling survival of Syzygium guineense ssp. afromontanum (a common forest species). Within each microsite, we quantified the overall probability of recruitment. We also measured seedling abundance of S. guineense ssp. afromontanum. We found that Ficus natalensis exerted both positive and negative impacts on the establishment of S. guineense ssp. afromontanum. Ficus natalensis facilitated seed deposition, seed germination, and seedling survival. On the other hand, seed removal at postdispersal stage was highest under F. natalensis. Interestingly, B. floribunda also had positive effects on germination and seedling survival, but not on seed deposition. When we excluded the seed arrival stage from our estimation of the recruitment probability, the highest value was found under B. floribunda, not under F. natalensis. When we included the seed arrival stage, however, the order of recruitment probability between F. natalensis and B. floribunda was reversed. The probability was one order of magnitude higher under F. natalensis than under B. floribunda. Our estimation of the probability which included the seed arrival stage was consistent with natural patterns of S. guineense ssp. afromontanum establishment. Despite the presence of opposite effects, the net effects of F. natalensis on S. guineense ssp. afromontanum recruitment in tropical woodlands can be positive.

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Section: Discussionsupporting

confidence: 92%

“…By providing perches and fruits, a certain tree species in an open ecosystem can attract frugivores from nearby tropical forests. As a result, the seeds of these forest tree species are brought to these microsites (Begnini & Castellani, ; Holl, ). In this study, we found that seed deposition of S .…”

Section: Discussionmentioning

confidence: 99%

Do consumer‐mediated negative effects on plant establishment outweigh the positive effects of a nurse plant?

Fujita

Yamashina

2018

Ecology and Evolution

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“…Moreover, the differences in seed rain under the four tree species suggest the importance of tree diversity, besides tree density, for a rich and abundant seed rain in pastures. Presumably, the different taxa of trees will attract more kinds of bats and other dispersers, which might enhance seed arrival to remnant trees (Nepstad et al, 1991;Begnini and Castellani, 2013;Blackham et al, 2013). These factors might have consequences on the dynamics of Cerrado regeneration favoring heterogeneity of future Cerrado tree community.…”

Section: Discussionmentioning

confidence: 99%

Seed rain generated by bats under Cerrado’s pasture remnant trees in a Neotropical savanna

Ragusa-Netto

Santos

2015

Braz. J. Biol.

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In this study we described the seed rain generated by bats under four Cerrado's tree species common within pastures, Buchenavia tomentosa, Couepia grandiflora, Licania humilis and Qualea grandiflora. We analyzed the similarity among the four tree species in terms of seed rain composition, and compared the number of seeds and seed species deposited under them. Besides that, we assessed the relationship between seed rain intensity and the density of each tree species. Then, we randomly selected 10 mature trees of each species to sample seed rain. We recorded a total of 4892 bat dispersed seeds from 11 species. Also, we observed that along the year seed deposition varied substantially under all trees. At least two seed sub-communities could be distinguished according to tree species used by bats as feeding roost. One related to Couepia grandiflora and Licania humilis, and the other to Buchenavia tomentosa and Qualea grandiflora trees. The variability of seed rain composition in any particular tree and the range of actual seed fall into a particular species indicate patchiness in seed rain, and the overall results appear to be consistent in terms of a substantial and diverse seed rain generated by bats in a highly anthropized landscape. This is the first study concerning seed dispersal by bats in modified Brazilian Cerrado, one of the most endangered biomes in the world. In this respect, by preserving a dense and diverse collection of remnant trees within today's pastures may, potentially, contribute to a faster Cerrado recovery in extensive areas that can be reclaimed for restoration in the future.Keywords: seed dispersal, seed diversity, frugivory, bat feeding roost, recruitment foci. Chuva de sementes gerada por morcegos sob árvores remanescentes do Cerrado no Brasil Central ResumoNeste estudo descrevemos a chuva de sementes gerada por morcegos sob quatro espécies arbóreas comuns em pastagens no Cerrado (Bouchenavia tomentosa, Couepia grandiflora, Licania humilis e Qualea grandiflora). Também, analisamos a similaridade quanto à composição da chuva de sementes depositada sob as quatro espécies arbóreas, além da relação entre a intensidade da chuva de sementes e densidade de cada espécies arbóreas. Para tanto, selecionamos aleatoriamente 10 árvores por espécie que fossem reprodutivamente maduras, para amostrar a chuva de sementes. Registramos um total de 4892 sementes, pertencentes a 11 espécies de plantas, dispersadas por morcegos. Durante o ano a deposição de sementes variou substancialmente sob todas as árvores amostradas. Duas sub-comunidades de sementes emergiram associadas às espécies arbóreas usadas por morcegos como abrigo de alimentação. Uma relacionada à Couepia grandiflora e Licania humilis, e outra relacionada à Buchenavia tomentosa e Qualea grandiflora. A variabilidade da composição da chuva de sementes sob qualquer uma das árvores, bem como a amplitude dessa chuva sob cada espécie de árvore indicou um padrão heterogêneo e intenso de deposição de uma coleção diversa de sementes em uma área alta...

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“…Ocorre do México ao Uruguai (Otegui 1998) e no Brasil está presente desde a Bahia ao extremo sul do Rio Grande do Sul (Carvalho 2003), estado onde se encontra em todas as formações florestais (Sobral et al 2006). É uma espécie pioneira, cujos frutos de dispersão zoocórica, são produzidos em abundância (Lorenzi 1992, Backes & Irgang 2002, Carvalho 2003) e amplamente consumidos pela fauna, que se encarrega da dispersão das sementes, sendo seus principais agentes dispersores as aves (Pineschi 1990, Pizo et al 2002, Jesus & Monteiro Filho 2007, Basler et al 2009, Begnini & Castellani 2013, Kaminski 2013, mas também mamíferos (Kuhlmann 1975, Oliveira & Leme 2013.…”

Section: Introductionunclassified

“…Ao atraírem animais e servirem de poleiros naturais, ajudam a incrementar a chuva de sementes e a regeneração florestal, pois por defecação ou regurgitação, novas sementes são depositadas sob suas copas, contribuindo com o estabelecimento de outras espécies. Begnini & Castellani (2013) avaliaram a chuva de sementes sob indivíduos de M. coriacea, constatando sua influência positiva na deposição Iheringia, Série Botânica, Porto Alegre, 73(2):108-113, 31 de agosto de 2018 de propágulos de novas espécies ao ambiente, sobretudo aqueles de dispersão zoocórica. Reis & Kageyama (2003) enfatizam a importância destas relações interespecíficas nos processos de restauração ecológica.…”

Section: Introductionunclassified

Germinação De Sementes De Myrsine Coriacea (Primulaceae) Submetidas a Diferentes Tratamentos Para Superação Da Dormência

Lucas¹,

Gomes²,

Guarino³

et al. 2019

Iheringia Ser Bot

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RESUMO-Myrsine coriacea (Sw.) R. Br. ex Roem. & Schult. é uma espécie arbórea nucleadora e alvo de intensa frugivoria, contribuindo para deposição de sementes de outras espécies. Devido suas sementes permanecerem no banco de sementes do solo, favorece a regeneração florestal após distúrbios naturais ou antrópicos. Com o objetivo de testar diferentes métodos para superação da dormência das sementes, foram analisados os seguintes tratamentos: Controle (TC), Escarificação Química (TQ), Escarificação Mecânica (TM) e Escarificação Térmica (TT). Foram avaliados os parâmetros: Percentual de Germinação (PG %), Índice de Velocidade de Germinação (IVG) e Tempo Médio de Germinação (TMG/dias). Para todos os parâmetros, o TM foi o mais eficaz para promoção da germinação, pois elevou a porcentagem e a velocidade de germinação, observando-se maior número de sementes germinadas em menor espaço de tempo. O TQ adotado foi deletério, e por isso não é recomendado. Não houve diferença significativa entre TC e TT. Palavras chave: escarificação, restauração ecológica, sementes florestais ABSTRACT-Seed germination of Myrsine coriacea (Primulaceae) submitted to different dormancy breaking treatments. Myrsine coriacea (Sw.) R.Br. ex Roem. & Schult. is a tree species with nucleation characteristics and a target to frugivorous animals, which contributes to the seed deposition to other plants. M. coriacea seeds remain in the soil for long periods, regenerating the forest after natural and anthropogenic disturbances. Four different methods were analysed with the aim to verify different types of breaking seed dormancy: Control (TC); Chemical Scarification (TQ); Mechanical Scarification (TM); Thermal Scarification (TT). The following parameters were evaluated, percentage of germination (PG) (%), germination speed index (IVG), and mean time of germination (TMG) (days). For all the parameters, we found that TM was more efficient at promoting germination, because it increased the percentage and speed of germination, which was observed with more seeds germinating in a short period of time. Meanwhile no difference was noticed between TC and TT, and the TQ was deleterious and is not recommended to break seed dormancy.

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Seed rain under the canopies of female and maleMyrsine coriacea, a pioneer tree from the Brazilian Atlantic forest

Cited by 11 publications

References 27 publications

Do consumer‐mediated negative effects on plant establishment outweigh the positive effects of a nurse plant?

Do consumer‐mediated negative effects on plant establishment outweigh the positive effects of a nurse plant?

Seed rain generated by bats under Cerrado’s pasture remnant trees in a Neotropical savanna

Germinação De Sementes De Myrsine Coriacea (Primulaceae) Submetidas a Diferentes Tratamentos Para Superação Da Dormência

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