Reproductive success of <i>Cardiopetalum calophyllum</i> (Annonaceae) treelets in fragments of Brazilian savanna

Elias, Marcos; Franceschinelli, Edivani Villaron; Juen, Leandro; Borges, F.; Ferreira, Glalko Machado; Carvalho, Fábio

doi:10.1017/s0266467412000120

Cited by 6 publications

(2 citation statements)

References 27 publications

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“…However, there are exceptions to such associations because Cardiopetalum calophyllum Schltdl., for instance, has diuturnal anthesis, a light green calyx, and a creamy corolla (Figure 2b). Elias et al (2012) [81] stated that this Annonaceae is pollinated by the nitidulid Lobiopa insularis Castelnau, a species of economic relevance as a pest in fruticulture that is widely distributed in the New World [82].…”

Section: Shelter For the Big And For The Small: Floral Chambers In The Cerradomentioning

confidence: 99%

Coleopteran Pollinators of Annonaceae in the Brazilian Cerrado—A Review

2021

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The evolutionary trajectories of insects and angiosperms appear to be intimately interconnected. Increases in the diversity of phytophagous beetles and angiosperms co-occur in the Mesozoic fossil record, and there is fossil evidence of pollinivory and pollination by insects, both in flowering plants and in gymnosperms. The oldest records of angiosperm pollination indicate flies as pollen vectors. A basal group of angiosperms, the order Magnoliales, has retained plesiomorphic characters such as dozens of pistils and stamens spiraling around the receptacle. In a family of this order, Annonaceae, over 90% of species are pollinated by beetles. In many Annonaceae species, flowers display wide spaces, referred to as floral chambers, where beetles can find shelter from weather conditions and predators, food in the form of pollen and tissues, and a mating site. Two basic types of floral chambers can be distinguished: small chambers visited by small beetles (Nitidulidae, Staphylinidae, Chrysomelidae, and Curculionidae) with diurnal and/or nocturnal activity and large and thermogenic floral chambers visited by beetles of the tribe Cyclocephalini (Scarabaeoidea, Melolonthidae). In the latter case, the heat that the flowers produce may serve as a resource for the beetles that visit them, resulting in smaller endothermy costs for the scarabs. This study reviewed the literature including PhD and MSc theses on cantharophilous Annonaceae in the Cerrado. In this biome, both types of associations are found, although cantharophilous Annonaceae represent a small portion of the plant species (<5%). Cantharophilous Annonaceae in the Cerrado share attributes according to the beetles that pollinate them: species pollinated by small beetles, for instance, may flower throughout the year, whereas Annonaceae pollinated by Cyclocephalini normally flower in the beginning of the rainy season (October/November), in synchrony with the phenological patterns of their pollinators. Cantharophilous Annonaceae flowers, regardless of their size, tend to have light colors and sweet and fruity odors. In addition to the lack of studies on the attraction of beetles by these floral characters, the taxonomic composition of the beetles that pollinate Annonaceae in the Cerrado is poorly known. This review attempts to discuss, in light of what has already been published, potential fields of investigation concerning pollinating beetles’ behavior and evolution.

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Section: Shelter For the Big And For The Small: Floral Chambers In The Cerradomentioning

confidence: 99%

Coleopteran Pollinators of Annonaceae in the Brazilian Cerrado—A Review

2021

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“…Pollinators as pollen vectors allow reproduction in angiosperms (Ashman et al, 2004;Knight et al, 2005). Ensuring effective reproduction requires biological attributes that allow them to reproduce effectively, which could determine differential ecological responses to the effects of habitat fragmentation (Da Silva Elias et al, 2012;Dainese et al, 2019). Certain adaptations of the reproductive biology of plants could be associated with the degree of dependence and/or specialization of their pollinators (Faegri & Pijl, 1979;Johnson & Steiner, 2000;Willmer, 2011).…”

Section: Introductionmentioning

confidence: 99%

Dependencia de los polinizadores como determinante de la susceptibilidad a la fragmentación del hábitat de Mucuna mutisiana (Kunth) D.C. Fabaceae en el bosque seco tropical del Caribe colombiano

Rebolledo Contreras,

Bohórquez Mieles,

Palacio

2022

NCMHN

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Las respuestas de las plantas a la fragmentación del hábitat vienen determinadas por su sistema reproductivo y el nivel de especialización de su sistema de polinización. Una forma de entender las posibles respuestas es a través del éxito reproductivo, el grado de autocompatibilidad y la susceptibilidad a la polinización. Mucuna mutisiana, una liana típica de bosques secundarios y asociada a las riberas de los ríos en los Bosques Secos Tropicales (BsT) del Caribe Colombiano, florece durante todo el año, aunque más frecuentemente en la época lluviosa; la mayoría de las visitas a sus flores son causadas por murciélagos nectarívoros, principalmente Glossophaga soricina y Glossophaga longirostris. Describimos que la especialización de la polinización aumenta esta susceptibilidad a la fragmentación debido al efecto negativo que tiene sobre el éxito reproductivo de las plantas al limitar la cantidad o calidad del polen que reciben. Utilizando métodos de polinización controlada, se evaluó la susceptibilidad reproductiva a la limitación de polen a través del éxito reproductivo de Mucuna mutisiana. Realizamos un experimento factorial de polinización artificial consistente con diferentes niveles de limitación de polen que nos permitió estimar la producción de frutos y semillas. Reportamos que M. mutisiana es parcialmente autocompatible, con un ISI = 0,776 y un éxito reproductivo de 34,04% cuando es visitada por sus polinizadores efectivos. Un análisis de varianza mostró que existe diferenciación en la producción de frutos entre los distintos niveles de polinización controlada, siendo mayor en polinización natural y polinización con polen propio, a diferencia de la polinización cruzada, donde los resultados no fueron significativos. Además, no se encontraron diferencias entre la producción de semillas por polinización natural y por autopolinización, observándose una mayor producción de semillas en la polinización cruzada. Esto confirma que M. mutisiana tiene afinidad por su propio polen, dependiendo de sus polinizadores. Es evidente que son xenógamas facultativas con apareamiento mixto, lo que les da seguridad reproductiva con ventajas para la aptitud de sus poblaciones. Se trata de un objetivo especialmente claro para desarrollar estrategias de restauración y conservación de hábitats autóctonos.

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Forest fragmentation effects on mutualistic interactions: frugivorous birds and fruiting trees

Siegel,

Cooper,

Forkner

et al. 2024

Oikos

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While many effects of forest fragmentation are reasonably well understood, knowledge of interspecific interactions in fragmented ecosystems is much more limited, particularly for high diversity tropical forests. Using nearly 40 years of data from the Biological Dynamics of Forest Fragments Project in Central Amazonia, we assessed whether forest fragment area and time since isolation impact mutualistic interactions between frugivorous birds and their food resources. We used structural equation modeling to analyze the complex pathways between four main variables determining these interactions: fruiting tree abundance, frugivorous bird abundance, forest fragment area, and time since fragment isolation. Our results confirm that fragment area alters the abundance of some tree resources, with successional plant families increasing in abundance with decreasing fragment size. However, these changes do not drive alterations in the abundance of frugivorous birds. We also tested if bird species with a greater relative diet breadth are less vulnerable to forest fragmentation and found that specialist frugivores are more vulnerable to forest fragmentation immediately after isolation but are not differentially impacted within the long term. Collectively, our results demonstrate the need to further evaluate human‐driven habitat change across multiple timescales to fully understand its impacts on complex species interactions.

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Reproductive success of Cardiopetalum calophyllum (Annonaceae) treelets in fragments of Brazilian savanna

Cited by 6 publications

References 27 publications

Coleopteran Pollinators of Annonaceae in the Brazilian Cerrado—A Review

Coleopteran Pollinators of Annonaceae in the Brazilian Cerrado—A Review

Dependencia de los polinizadores como determinante de la susceptibilidad a la fragmentación del hábitat de Mucuna mutisiana (Kunth) D.C. Fabaceae en el bosque seco tropical del Caribe colombiano

Forest fragmentation effects on mutualistic interactions: frugivorous birds and fruiting trees

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