Distinct ecophysiological strategies of widespread and endemic species from the megadiverse campo rupestre

Pereira, Eduardo Gusmão; Siqueira-Silva, Advanio Inácio; Souza, Anna Elisa de; Melo, Nayara Magry Jesus; Souza, João Paulo

doi:10.1016/j.flora.2017.02.006

Cited by 9 publications

(5 citation statements)

References 39 publications

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“…Nevertheless, since HPD was associated with higher fruit set, the pollen deposition pattern was not a limiting factor for fruit set in the studied species. Other factors may be limiting the reproductive success of plants in Campos Rupestres, such as shallow and sandy soils, with low water capacity and/or low nutrient availability (Benites et al 2007, Rapini et al 2008, Negreiros et al 2014, Willcox et al 2017, Pereira et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Heterospecific pollen deposition is positively associated with reproductive success in a diverse hummingbird‐pollinated plant community

Lopes

Bergamo

Queiroz

et al. 2021

Oikos

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Heterospecific pollen deposition (HPD) is ubiquitous across plant communities, especially for generalized species which use a diversity of pollinators, and may have negative effects on plant reproduction. However, it is unclear whether temporal changes in the co‐flowering community result in changes in HPD patterns. Moreover, community‐level studies are required to understand which factors influence HPD and how the reproduction of different species is affected. We investigated the temporal variation of HPD, its relationship with level of specialization on pollinators and floral phenotypic specialization, and its association with reproductive success (pollen limitation and fruit set) in 31 hummingbird‐pollinated plant species in a tropical Campo Rupestre. We found seasonality in HPD, with species flowering in the dry season having greater diversity of heterospecific pollen on stigmas and a higher frequency of stigmas containing heterospecific pollen, compared to the rainy season. Stigmas of ecologically generalized species had more heterospecific pollen, while the relationship for ecologically specialized species depended on floral phenotype. Surprisingly, and in contrast to theory, we found a positive relationship between HPD and reproductive success. Our results indicate benefits of generalization and facilitation, in which sharing pollinators brings greater reproductive success via increased conspecific pollen deposition, even if it incurs more HPD. We demonstrated how assessing HPD at a community‐level can contribute to understanding the ecological causes and functional consequences of pollinator sharing.

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Section: Discussionmentioning

confidence: 99%

Heterospecific pollen deposition is positively associated with reproductive success in a diverse hummingbird‐pollinated plant community

Lopes

Bergamo

Queiroz

et al. 2021

Oikos

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“…Owing to consistent differences in water relations, but not in photosynthetic performance among species from these two microhabitats, they argue that differential water-economy strategies support hydrological niche segregation in campo rupestre; this species trait may help stabilize species coexistence. Along this line, Pereira et al (2018) compared photosynthetic and leaf nutrient-use strategies in three phylogenetically-unrelated species with contrasting levels of endemism. The authors ask whether species distribution is linked to ecophysiological parameters, and if so, should widespread species have wider niche breadths compared with endemic ones?…”

Section: Species Coexistence Regeneration Niche and Climate Changementioning

confidence: 99%

Plant life in campo rupestre : New lessons from an ancient biodiversity hotspot

Morellato

Silveira²

2018

Flora

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“…The ability to detect remaining campo limpo úmido and protect it is therefore valuable from a conservation and a climate change mitigation perspective. Similarly, campo rupestre vegetation is highly biodiverse with extremely high numbers of endemics and a high functional diversity in order to tolerate different environmental stressors, however, the area of campo rupestre across Brazil is low 104 , 105 , thus making accurate detection highly valuable to conservation efforts.…”

Section: Discussionmentioning

confidence: 99%

Mapping native and non-native vegetation in the Brazilian Cerrado using freely available satellite products

Lewis

Barros

Cure

et al. 2022

Sci Rep

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Native vegetation across the Brazilian Cerrado is highly heterogeneous and biodiverse and provides important ecosystem services, including carbon and water balance regulation, however, land-use changes have been extensive. Conservation and restoration of native vegetation is essential and could be facilitated by detailed landcover maps. Here, across a large case study region in Goiás State, Brazil (1.1 Mha), we produced physiognomy level maps of native vegetation (n = 8) and other landcover types (n = 5). Seven different classification schemes using different combinations of input satellite imagery were used, with a Random Forest classifier and 2-stage approach implemented within Google Earth Engine. Overall classification accuracies ranged from 88.6–92.6% for native and non-native vegetation at the formation level (stage-1), and 70.7–77.9% for native vegetation at the physiognomy level (stage-2), across the seven different classifications schemes. The differences in classification accuracy resulting from varying the input imagery combination and quality control procedures used were small. However, a combination of seasonal Sentinel-1 (C-band synthetic aperture radar) and Sentinel-2 (surface reflectance) imagery resulted in the most accurate classification at a spatial resolution of 20 m. Classification accuracies when using Landsat-8 imagery were marginally lower, but still reasonable. Quality control procedures that account for vegetation burning when selecting vegetation reference data may also improve classification accuracy for some native vegetation types. Detailed landcover maps, produced using freely available satellite imagery and upscalable techniques, will be important tools for understanding vegetation functioning at the landscape scale and for implementing restoration projects.

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Distinct ecophysiological strategies of widespread and endemic species from the megadiverse campo rupestre

Cited by 9 publications

References 39 publications

Heterospecific pollen deposition is positively associated with reproductive success in a diverse hummingbird‐pollinated plant community

Heterospecific pollen deposition is positively associated with reproductive success in a diverse hummingbird‐pollinated plant community

Plant life in campo rupestre : New lessons from an ancient biodiversity hotspot

Mapping native and non-native vegetation in the Brazilian Cerrado using freely available satellite products

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