Southward migration of the austral limit of mangroves in South America

Cohen, Marcelo Cancela Lisboa; Rodrigues, Erika; Rocha, Denise O.S.; Freitas, Jaine; Fontes, Neuza A.; Pessenda, Luiz Carlos Ruiz; Souza, Adriana V. de; Gomes, Vivian L.P.; França, Marlon Carlos; Bonotto, Daniel Marcos; Bendassolli, José Albertino

doi:10.1016/j.catena.2020.104775

Cited by 27 publications

(23 citation statements)

References 76 publications

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“…Determining the spatial and temporal scales of mangrove degradation are essential for assessing environmental disturbances and their drivers (Vogt et al ., 2014). Allogenic processes (Cecil, 2013), related to large‐scale disturbances in mangroves, are mainly attributed to RSL and climate changes (Cohen et al ., 2012, 2020a,b; Rodrigues et al ., 2021). By contrast, autogenic disturbances on mangroves occur on small time scales (annual to interannual, 0.5–10 years) and with local impacts on the ecosystem (Pickett and White, 2005) such as strong winds (Jeltsch, 1992), fires (Ratz, 1995) and insect attacks (Coley and Barone, 1996; Menezes and Mehlig, 2005).…”

Section: Discussionmentioning

confidence: 99%

“…Mangroves were established on the tropical Brazilian coast between ~7000 and ~6000 cal a bp due to lower rates of RSL rise or a stable RSL (Cohen et al ., 2012, 2014a, 2020a; França et al ., 2013, 2015; Fontes et al ., 2017; Ribeiro et al ., 2018), while these forests were established on the subtropical Brazilian coast between ~2200 and ~1630 cal a bp (Pessenda et al ., 2012; França et al ., 2019). These data suggest a poleward mangrove migration induced by a warming climate during the Holocene (Cohen et al ., 2020b; Rodrigues et al ., 2021). From a climatic point of view, the tropical mangrove dynamics were more susceptible to changes in precipitation than in temperature during the Holocene (Cohen et al ., 2012, 2020a; França et al ., 2013; França et al ., 2016; Fontes et al ., 2017).…”

Section: Discussionmentioning

confidence: 99%

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Effects of the middle Holocene high sea‐level stand and climate on Amazonian mangroves

Cohen

Camargo

Pessenda

et al. 2021

J Quaternary Science

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The high sea-level stand during the mid-Holocene is a benchmark in mangrove dynamics along the north-east/south-east coast of Brazil and provides a reference point for landward and seaward mangrove migrations corresponding to changes in relative sea level (RSL). However, evidence of the impacts associated with RSL fall on the northern Brazilian coast is scarce. Multi-proxy data from the highest tidal flats of the Bragança Peninsula in northern Brazil revealed modern herbaceous areas were occupied by mangroves Rhizophora and Avicennia from 6250 to~5850 cal a BP, and only Avicennia between~5850 and~5000 cal a BP. The same tidal flats were vegetation-free between~5000 and~4300 cal a BP. A combination of a high sea-level stand (0.6 ± 0.1 m) at 5000 cal a BP and a dry early-middle Holocene in the Amazon probably caused an increase in porewater salinity of tidal flats, which resulted in a mangrove succession from Rhizophora to Avicennia dominance. RSL fall accentuated this process, contributing to mangrove degradation between~5000 and~4300 cal a BP. RSL fall, and a wetter period over the past~4300 cal a BP caused a mangrove migration from highest to lowest flats, followed by expansion of herbaceous vegetation on the highest flats.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effects of the middle Holocene high sea‐level stand and climate on Amazonian mangroves

Cohen

Camargo

Pessenda

et al. 2021

J Quaternary Science

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“…Under this perspective, geochronological studies of sediments have also included results of their chemical composition and of the waters transporting them, aiming to increase the knowledge about of the main factors affecting their deposition cycles and pollutant inputs. Some examples are the studies held by Bonotto and Lima (2006), Sabaris and Bonotto (2010), Nery and Bonotto (2011), Terry et al (2011), Burone et al (2011), Hülse and Bentley (2012), Sanchez-Cabeza and Ruiz-Fernandez (2012), Zal and Yii (2012), Xia et al (2012), Matamet and Bonotto (2013, 2019a, 2019b, Cearreta et al (2018), Celis-Hernández et al (2018), Bonotto (2020), Cohen et al (2020), among others. This investigation follows the same approach previously adopted in hydrographic basins situated in inland areas, but considering now a completely diverse hydrological system located in a very strategically important Brazilian coastal zone.…”

Section: Introductionmentioning

confidence: 98%

Sedimentation rates by the 210Pb chronological method in Itanhaém river watershed, southeast Brazil

Cigagna

Bonotto

Camargo

2021

Environ Monit Assess

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in the waters. Silica is the predominant constituent in the sediment cores and is inversely related to the organic matter (OM) presence. Inverse correlations were also found between silica and other constituents. The watershed sedimentation rates were determined in the range of 0.31 up to 3.97 g/cm 2 /year and 0.30 up to 3.40 cm/year, highlighting the core extracted from Branco river, which showed the highest sedimentation rate. The profiles corresponding to Preto and Aguapeú rivers presented discontinuities in the sedimentation rates. The discontinuities were dated and would probably be related to the anthropic activities, which intensified in the municipality of Itanhaém around the middle of the twentieth century.

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“…Hence, insights into how foundation species will respond to climate change will inevitably inform predictions about responses of entire ecosystems (Bernhardt & Leslie, 2013). A well-documented example of foundation species undergoing climate-driven range expansion is that of mangroves at their poleward range margins (Armitage, Highfield, Brody, & Louchouarn, 2015;Cavanaugh et al, 2014;Cohen et al, 2020;Fazlioglu, Wan, & Chen, 2020;Saintilan, Wilson, Rogers, Rajkaran, & Krauss, 2014;Whitt et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Genetically-based adaptive trait shifts at an expanding mangrove range margin

Kennedy

Johnson

Preziosi

et al. 2021

Preprint

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Many species are expanding beyond their distributional range margins in response to a warming planet. Due to marginal environmental conditions and novel selection pressures, range margins may foster unique genetic adaptations that can better enable species to thrive under the extreme climatic conditions at and beyond their current distributional limits. Neotropical black mangrove (Avicennia germinans) is expanding poleward into temperate salt marsh along Atlantic Florida, USA, with field evidence of adaptive trait shifts within range-margin A. germinans populations. However, whether these adaptive shifts have a genetic basis remains to be answered. We monitored twenty A. germinans maternal cohorts from areas in both the Atlantic Florida range core and margin in a greenhouse common garden with annual temperatures analogous to range-margin conditions. We measured variation in a series of phenotypic traits starting at initial planting of field-collected propagules and continuing until two years development. Maternal cohorts from the Atlantic Florida range margin consistently outperformed those from the range core throughout the experiment. Range-margin cohorts survived in greater numbers, established faster, and were less stressed under winter chilling and sub-zero temperatures that are often reached at the Atlantic range margin, but not within the range core. Range-margin cohorts did not grow taller, but instead invested more into lateral growth and biomass accumulation that presumably reflects adaptation to their colder and open canopy environment. Range-margin cohorts also exhibited leaf traits consistent with greater resource acquisition that may compensate for a shorter growing season and reduced light quality at higher latitude. Synthesis: We confirmed that there is a genetic basis to adaptive trait shifts towards an expanding mangrove range margin. Our results suggest that genetically-based phenotypic differences better enable these range-margin mangroves to thrive within their stressful environment and may facilitate further poleward expansion in the future. In addition, our documentation of adaptive trait variation among maternal cohorts of an ecologically-important mangrove foundation species, quantitative data that is lacking for mangroves, should help inform mangrove restoration initiatives.

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Southward migration of the austral limit of mangroves in South America

Cited by 27 publications

References 76 publications

Effects of the middle Holocene high sea‐level stand and climate on Amazonian mangroves

Effects of the middle Holocene high sea‐level stand and climate on Amazonian mangroves

Sedimentation rates by the 210Pb chronological method in Itanhaém river watershed, southeast Brazil

Genetically-based adaptive trait shifts at an expanding mangrove range margin

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