The mangroves of Araçá Bay through time: An interdisciplinary approach for conservation of spatial diversity at large scale

Schaeffer-Novelli, Yara; Cintrón-Molero, Gilberto; Reis-Neto, Armando S.; Abuchahla, Guilherme M.O.; Neta, Luiza C. Pinto; Lira, Catarina Fonseca

doi:10.1016/j.ocecoaman.2017.12.024

Cited by 17 publications

(12 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The other area was Guanabara Ecological Station (ESEC Guanabara) inside Guapimirim Protected Area (APA Guapimirim), a well-conserved mangrove area on the other side of Guanabara Bay in RJ. The third area was at the Araçá Bay in São Sebastião (SP), which is a very degraded and low-numbered population but has high genetic diversity levels within its remnant mangrove plants, making it vital to conserve [40].…”

Section: Studied Areas and Plant Materialsmentioning

confidence: 99%

“…The Araçá Bay population of L. racemosa also has very low genetic diversity levels, and requires urgent management to avoid the effects of genetic drift and to successfully conserve the remnant genetic diversity of this area. Araçá Bay is highly threatened, its population significantly reduced by habitat destruction and human pressure; it should be urgently preserved and restored considering its high genetic diversity [40].…”

Section: Mangrove Restoration Practices Caused Bottleneck In Introducmentioning

confidence: 99%

See 1 more Smart Citation

Assessing Genetic Diversity after Mangrove Restoration in Brazil: Why Is It So Important?

et al. 2018

View full text Add to dashboard Cite

Vital for many marine and terrestrial species, and several other environmental services, such as carbon sink areas, the mangrove ecosystem is highly threatened due to the proximity of large urban centers and climate change. The forced fragmentation of this ecosystem affects the genetic diversity distribution among natural populations. Moreover, while restoration efforts have increased, few studies have analyzed how recently-planted areas impact the original mangrove genetic diversity. We analyzed the genetic diversity of two mangroves species (Laguncularia racemosa and Avicennia schaueriana) in three areas in Brazil, using inter-simple sequence repeat (ISSR) markers. Using the local approach, we identified the genetic diversity pool of a restored area compared to nearby areas, including the remnant plants inside the restored area, one well-conserved population at the shore of Guanabara Bay, and one impacted population in Araçá Bay. The results for L. racemosa showed that the introduced population has lost genetic diversity by drift, but remnant plants with high genetic diversity or incoming propagules could help improve overall genetic diversity. Avicennia schaueriana showed similar genetic diversity, indicating an efficient gene flow. The principal component analysis showing different connections between both species indicate differences in gene flow and dispersal efficiencies, highlighting the needed for further studies. Our results emphasize that genetic diversity knowledge and monitoring associated with restoration actions can help avoid bottlenecks and other pitfalls, especially for the mangrove ecosystem.

show abstract

Section: Studied Areas and Plant Materialsmentioning

confidence: 99%

Section: Mangrove Restoration Practices Caused Bottleneck In Introducmentioning

confidence: 99%

Assessing Genetic Diversity after Mangrove Restoration in Brazil: Why Is It So Important?

et al. 2018

View full text Add to dashboard Cite

show abstract

“…ex Moldenke), white mangroves (Laguncularia racemosa (L.) C.F.Gaertn. ), and red mangroves (Rhizophora mangle L.), which cover an area of 3,644 m 2 (6% of the bay's total area) (Schaeffer-Novelli et al, 2018). Sandy beaches are interspersed between these mangrove spots, two small islets and rocky shores, with one side of the bay delimited by a rockfill.…”

Section: Methodsmentioning

confidence: 99%

“…1), close to Araçá bay (Matsuura, 1998). Moreover, Araçá contains areas with the last remaining mangroves along the northern coast of São Paulo State, attesting its vitality and social-ecological importance (Amaral et al, 2015;Schaeffer-Novelli et al 2018). Overall, this makes the bay an ideal example area of a highly productive and diverse subtropical tidal flat.…”

Section: Introductionmentioning

confidence: 98%

Optimal fishing samplers to reveal the morphological structure of a fish assemblage in a subtropical tidal flat

et al. 2019

View full text Add to dashboard Cite

Morphological characters of species are essential for assessing the functional structure of a fish assemblage, since differences between them, for example in body shape, are related to many functional and ecological traits (e.g., swimming, search for food, striking and capturing prey, evading predators, spawning). Globally, tidal flats are relevant to fish assemblages by offering feeding, refuge, and reproduction grounds. To analyze the morphofunctional structure of the fish assemblage from a tidal flat on the Brazilian coast, we conducted standardized sampling using nine different fishing gears. The geometric morphometric method was applied to describe the fish shapes and verify the morphological structure of the assemblage. Here, we present the influence/susceptibility of each gear type on the morphological diversity of the fish assemblage. The results indicated that beach seine, otter trawl, marginal encircling gillnet, and fish traps, together, were the most effective gears to represent the maximum morphological variability of fish inhabiting that tidal flat. Moreover, the assemblage showed high morphological redundancy considered as a resistance of the ecosystem for avoiding functional diversity loss, emphasizing the importance of complementary gear use when determining fish assemblages in a conservation context.

show abstract

“…It is estimated that 35-84% (depending on the locality) of the original mangrove has been lost to anthropogenic activities [27] and regional and global trends are worrying [28,29]. Therefore, conservation of the remaining original mangrove forests needs our utmost attention [30,31].…”

Section: Introductionmentioning

confidence: 99%

Distinguishing Original and Non-Original Stands at the Zhanjiang Mangrove National Nature Reserve (P.R. China): Remote Sensing and GIS for Conservation and Ecological Research

et al. 2021

View full text Add to dashboard Cite

The present research developed a novel methodological framework to differentiate natural mangrove stands (i.e., original), from stands which were planted and stands naturally established after interaction between planted and non-planted stands (e.g., through pollination, i.e., non-original). Ground-truth and remote sensing data were collected for Zhanjiang Mangrove National Nature Reserve (ZMNNR) in P.R. China. First, satellite images of Corona (1967) and GeoEye-1 (2009) were overlaid to identify original (1967) and non-original (2009) mangrove stands. Second, in both stands a total of 75 in situ plots (25 m2) were measured for ground-truthing of tree structural parameters including height, density, basal area and Complexity Index (CI). From temporal satellite data, we identify 236.12 ha of original mangrove and 567.88 ha of non-original mangrove in the reserve. Averaged measurements of the original mangrove stands, i.e., stem density (1164 nos. 0.1 ha−1), basal area (90.3 m2 0.1 ha−1) and CI (100.59), indicated that they were in a state of maturity and less disturbed compared to the non-original mangroves (density, 1241 nos. 0.1 ha−1; basal area, 4.92 m2 0.1 ha−1 and CI, 55.65). The Kruskal–Wallis test showed significant differentiation between the original and non-original mangrove tree structural parameters: Kandelia obovata’s density, X2 = 34.78, d.f. = 1, p = 0.001; basal area, X2 = 108.15, d.f. = 1, p = 0.001; Rizhopora stylosa’s density, X2 = 64.03, d.f. = 1, p = 0.001; basal area, X2 = 117.96, d.f. = 1, p = 0.001. The latter is also evident from the clustering plots generated from the Principal Component Analysis (PCA). Vegetation dynamics at the ZMNNR also enabled us to compare the species composition and distribution patterns with other Indo-West Pacific regions. Overall, the present study not only highlights the advantage of >50 years old satellite data but also provide a benchmark for future ecological research, conservation and management of the ZMNNR.

show abstract

The mangroves of Araçá Bay through time: An interdisciplinary approach for conservation of spatial diversity at large scale

Cited by 17 publications

References 37 publications

Assessing Genetic Diversity after Mangrove Restoration in Brazil: Why Is It So Important?

Assessing Genetic Diversity after Mangrove Restoration in Brazil: Why Is It So Important?

Optimal fishing samplers to reveal the morphological structure of a fish assemblage in a subtropical tidal flat

Distinguishing Original and Non-Original Stands at the Zhanjiang Mangrove National Nature Reserve (P.R. China): Remote Sensing and GIS for Conservation and Ecological Research

Contact Info

Product

Resources

About