Flood regime as a driver of the distribution of mangrove and salt marsh species in a subtropical estuary

Spier, Daphne; Gerum, Humberto Luiz Nadolny; Noernberg, Maurício Almeida; Lana, Paulo da Cunha

doi:10.1016/j.jmarsys.2016.05.004

Cited by 25 publications

(7 citation statements)

References 51 publications

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“…In SE Australian estuaries, a typical zonation of vegetation communities exists, with a sequence that includes mudflats at the seaward margin, mangrove in the lower and middle areas of the tidal frame and saltmarsh at the upper limit of the tidal frame. Similar vegetation structure can be found on the southeast coasts of US (Armitage et al, 2015) and China (Chen et al, 2016), southern estuaries of Brazil (Spier et al, 2016) and New Zealand (Hayward et al, 1999, Lundquist et al, 2014. The most common species of saltmarshes of SE Australia are Sarcocornia quinqueflora, Sporobolus virginicus and Juncus krausii (Boon et al, 2015), while Avicennia marina and Aegiceras corniculatum are the two dominant species of mangrove.…”

Section: Introductionmentioning

confidence: 54%

“…Tidal regime has been recognized as a critical driver of saltmarsh and mangrove distribution of mixed environments (Spier et al, 2016), and combined with the topography determines inundation extent, water depth, and frequency of inundation. It also influences soil salinity, mangrove propagule establishment and nutrient propagation (Saintilan et al, 2009 and references therein), with high soil salinity in the upper tidal frame reducing the dominance of mangrove (Crase et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

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Rising tides, rising gates: The complex ecogeomorphic response of coastal wetlands to sea-level rise and human interventions

Sandi

Rodríguez

Saintilan

et al. 2018

Advances in Water Resources

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Coastal wetlands are vulnerable to submergence due to sea-level rise, as shown by predictions of up to 80% of global wetland loss by the end of the century. Coastal wetlands with mixed mangrove-saltmarsh vegetation are particularly vulnerable because sea-level rise can promote mangrove encroachment on saltmarsh, reducing overall wetland biodiversity. Here we use an ecogeomorphic framework that incorporates hydrodynamic effects, mangrove-saltmarsh dynamics, and soil accretion processes to assess the effects of control structures on wetland evolution. Migration and accretion patterns of mangrove and saltmarsh are heavily dependent on topography and control structures. We find that current management practices that incorporate a fixed gate for the control of mangrove encroachment are useful initially, but soon become ineffective due to sea-level rise. Raising the gate, to counteract the effects of sea level rise and promote suitable hydrodynamic conditions, excludes mangrove and maintains saltmarsh over the entire simulation period of 100 years

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Section: Introductionmentioning

confidence: 54%

Section: Introductionmentioning

confidence: 99%

Rising tides, rising gates: The complex ecogeomorphic response of coastal wetlands to sea-level rise and human interventions

Sandi

Rodríguez

Saintilan

et al. 2018

Advances in Water Resources

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“…The effect of the hydrological regime on mangrove regeneration in the restoration area indicated a differential trend. The establishment of A. germinans showed a patchy distribution, occurring only at the sites where the conditions were appropriate (Lewis 2005, Monroy-Torres et al 2014, Spier et al 2016. Not all the restoration area responded to the restoration actions at the same speed because the appropriate environmental conditions did not occur throughout the area.…”

Section: Discussionmentioning

confidence: 98%

Contribution of microtopography and hydroperiod to the natural regeneration of Avicennia germinans in a restored mangrove forest

et al. 2017

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We evaluated the success of the ecological restoration of a degraded mangrove forest by monitoring the natural regeneration of Avicennia germinans (black mangrove). The restoration actions focused on hydrological rehabilitation by desilting tidal channels and modifying the microtopography to enhance or restore water flow. As a result of these efforts, a population of black mangrove established naturally. Six sampling sites including restored and reference areas were established. We measured seedling survival; tree density, height, and growth rate; and the physical and chemical characteristics of soil and water. According to a redundancy analysis, microtopography and hydroperiod contributed the most to the establishment and development of the black mangrove. Microtopography ranged from 0.08 to 0.14 m above sea level. In the case of the hydroperiod, water level ranged from 0.11 to 0.14 m, flooding duration ranged from 439 to 529 h per month, and frequency was 7 to 8 floods per month. Our results highlight the contribution of microtopography and hydroperiod to the natural establishment of black mangrove. It is important to consider these 2 variables in mangrove ecological restoration.

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“…The estuaries across the Auckland Region were classified as large estuaries (>1000 ha, n = 12) and small estuaries (<1000 ha, n = 26) based on the criteria described by Hume, Snelder, Weatherhead, and Liefting (). The separation of mangrove locations within a given estuary into downstream (16–53‰) and upstream (0–16‰) followed the estuary gradient concept based on differences in salinity developed by Duke et al (), and modified by Hayes et al () and Spier et al (). Water samples were collected in the tidal channels of a given estuary.…”

Section: Methodsmentioning

confidence: 99%

“…Significant increases of mangrove area along the Pacific coast of Mexico have been associated with sea‐level rise and warm surface waters during El Niño (López‐Medellín et al, ). Oceanic factors differ both between and within estuaries, in particular between the estuary mouth (downstream) and upstream estuary regions (Duke et al, , ; Eslami‐Andargoli, Dale, & Sipe, ; Hayes et al, ; Spier, Gerum, Noernberg, & Lana, ).…”

Section: Introductionmentioning

confidence: 99%

Land‐based and climatic stressors of mangrove cover change in the Auckland Region, New Zealand

Suyadi

Gao

Lundquist

et al. 2019

Aquatic Conservation

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1. Changes in mangrove forest cover (increases and decreases) have been observed globally as a result of the influence of environmental changes and human impacts.Although mangrove forest increases are globally uncommon, in New Zealand mangroves are increasing in distribution at the expense of other intertidal estuarine habitats.2. This study quantified the change in mangrove area over a period of 74 years , and investigated the influence of land-based (e.g. land use conversion in the catchments), climatic, and oceanic factors on the change in temperate mangrove forest cover in the Auckland Region of New Zealand over that period.3. An improved mapping approach using aerial photographs and Landsat images was applied to quantify changes in tall and dwarf mangrove cover, and to identify the mechanism of change (expansion, gap filling, and loss), across 38 estuaries in the Auckland Region, New Zealand. 4. Mangrove area increased from 2313 ha in 1940 to 10 483 ha in 2014 (on average 3.2% yr −1 ), with higher rates in small estuaries (<1000 ha) than in large estuaries (>1000 ha). The area of the intertidal mudflat habitat, i.e. potential area for mangrove colonization, has doubled from 14 193 ha in 1974 to 28 764 ha in 2014.The increase in total mangrove area was explained primarily by gap filling followed by expansion. The proportion of expansion-related increase was predominantly seaward (82%) but mangroves also expanded upstream (16%). 5.Boosted regression tree analysis revealed that catchment forest cover, sea level, and mean annual air temperature explained around 85% of the variation in mangrove area. Periods of catchment forest clearing coincided with gains in mangrove forest area. Dwarf mangroves were more sensitive to changes in sea level, in particular over the past 25 years, when the annual sea-level rise exceeded the sediment accumulation rates. 6. Catchment land use, especially the clearing of forests, associated with increased sediment supply into estuaries is the strongest driver of mangrove forest gain.Thus, land-use management is a necessary aspect of the management of New Zealand estuaries to conserve the diversity of estuarine habitats (including mangroves) and the ecosystem services that each habitat provides.

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Flood regime as a driver of the distribution of mangrove and salt marsh species in a subtropical estuary

Cited by 25 publications

References 51 publications

Rising tides, rising gates: The complex ecogeomorphic response of coastal wetlands to sea-level rise and human interventions

Rising tides, rising gates: The complex ecogeomorphic response of coastal wetlands to sea-level rise and human interventions

Contribution of microtopography and hydroperiod to the natural regeneration of Avicennia germinans in a restored mangrove forest

Land‐based and climatic stressors of mangrove cover change in the Auckland Region, New Zealand

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