Interactive effects of temperature and nutrients on mangrove seedling growth and implications for establishment

Gillis, Lucy Gwen; Hortua, Daniel Arturo Saavedra; Zimmer, Martin; Jennerjahn, Tim C; Herbeck, Lucia S.

doi:10.1016/j.marenvres.2019.104750

Cited by 19 publications

(22 citation statements)

References 38 publications

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“…Our findings showed a more complex root system at all points where SP was lowest, indicating trees are developing roots to search for phosphorus in the sediment. Studies have also found fertilization of sediments with phosphorus or nitrogen has increased BGB (Lovelock et al 2006 a ; Hayes et al 2017) and mangrove seedlings root complexity (Gillis et al 2019). Leaf thickness decreased with increasing SP, in agreement with a study from Belize (Feller 1996).…”

Section: Discussionmentioning

confidence: 99%

Understanding how nutrient limitation and plant traits influence carbon in mangrove‐seagrass coastal ecosystems

Kammann

Hortua²,

Kominoski

et al. 2022

Limnology & Oceanography

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Mangrove forests and seagrass meadows provide critical ecosystem services, including the accumulation of "blue carbon." Plants' functional traits could influence this blue carbon accumulation. To test for interactions among functional traits and blue carbon accumulation, we conducted a study in connected mangrove-seagrass coastal ecosystems in southeast Florida (USA). We quantified how plants' above-ground traits correlated with sediment nutrient content, and how changes in traits along inland-to-coastal gradients influenced inorganic and organic carbon storage potential. Physical traits of Thalassia testudinum were higher at sites with higher sediment phosphorus (SP) and nitrogen (SN) concentrations. Sediment organic carbon concentrations were positively correlated to T. testudinum physical traits. Root density, pneumatophore abundance, specific leaf area, leaf toughness, leaf nitrogen, and phosphorus content were positively correlated with SN concentrations in the mangrove forest coastal fringe. Mangrove leaf thickness and root complexity index were negatively correlated with SP concentrations in the coastal fringe. Our results also indicate that seagrass above-ground traits and blue carbon were strongly correlated in areas with higher sediment nutrient concentrations. Moreover, mangrove root complexity is coupled with phosphorus limitation, whereby highly complex root systems develop with decreasing phosphorus concentrations. Distinct functional traits of plants drive variation in carbon retention capacity even in interconnected ecosystems.

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Section: Discussionmentioning

confidence: 99%

Understanding how nutrient limitation and plant traits influence carbon in mangrove‐seagrass coastal ecosystems

Kammann

Hortua²,

Kominoski

et al. 2022

Limnology & Oceanography

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“…Their early detection, preferably during site research before any intervention has taken place, will help to alleviate much of this early seedling mortality. For instance, Gillis et al (2019) provide evidence for hampered root development under conditions of high nutrient exposure (e.g., from aquaculture effluents). Poorly developed roots will result in reduced resistance of saplings to being uprooted by heavy wave action or storm surges.…”

Section: Stressors and Disturbancementioning

confidence: 99%

When nature needs a helping hand: Different levels of human intervention for mangrove (re-)establishment

Zimmer

Ajonina

Amir

et al. 2022

Front. For. Glob. Change

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Protecting existing mangrove forests is a priority for global conservation because of the wide range of services that these coastal forests provide to humankind. Despite the recent reduction in global rates of mangrove loss, high historical loss rates mean that there are at least 800,000 ha globally that are potentially suitable for mangrove re-establishment. Recently deposited mud banks or intertidal, previously terrestrial, land might provide additional habitat for expanding mangrove areas locally. There is a long history of mangrove rehabilitation. However, despite numerous good examples of, and growing expertise in, natural or assisted (re-)establishment activities, most mangrove planting efforts, for instance, either fail entirely or meet with only limited success. Exposed to waves and currents and subject to tidal inundation, mangroves differ from terrestrial forests, and approaches to, or tools for, terrestrial forest restoration cannot easily be transferred to mangrove forests. Successful mangrove (re-)establishment usually requires a robust understanding of the abiotic and biotic conditions of the chosen site, the ecological requirements of the mangrove species used or facilitated, the reasons for previous mangrove loss or degradation, as well as the barriers–both societal and ecological–that have prevented natural recovery to date. Because most mangrove forests are socio-ecological systems, with which local human populations are intimately engaged, (re-)establishment will normally require the support of, and engagement with, local communities and other local stakeholders. Here, we summarize where, when and why (re-)establishment of mangroves is needed and how to assess this need. We discuss a range of potential aims and goals of mangrove (re-)establishment along with potential pitfalls along the way from conceiving the initial idea to its realization. We compare different technical and conceptual approaches to mangrove (re-)establishment, their challenges and opportunities, and their design and financial requirements, as well as potential solutions. We ground our final outlook and recommendations on examples of successful efforts and the factors that rendered (re-)establishment successful in the past.

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“…Furthermore, our study was carried out across different seasons with different temperatures, because we used species whose propagules reach maturity in different seasons. Seasonal differences such as temperature can affect the growth rate of seedlings, and even within a season, or across years, different growth rates may be found (e.g., Gillis et al 2019). Temperature difference may also have an impact on the erodibility of coastal sediment and the resulting critical erosion depth (Nguyen et al 2019).…”

Section: Optimal Seedling Morphology and Traits To Withstand Erosion ...mentioning

confidence: 99%

Identifying trait‐based tolerance to sediment dynamics during seedling establishment across eight mangrove species

Hespen

Peng

et al. 2022

Limnology & Oceanography

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Mechanical disturbance from waves and sediment dynamics is a key bottleneck to mangrove seedling establishment. Yet, how species vary in tolerance to sediment dynamics has not been quantified. We identified how tolerance to sediment dynamics differs for three mangrove propagule traits: propagule size, successional stage, and type of embryo development. We selected eight mangrove species growing in south China that vary

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Interactive effects of temperature and nutrients on mangrove seedling growth and implications for establishment

Cited by 19 publications

References 38 publications

Understanding how nutrient limitation and plant traits influence carbon in mangrove‐seagrass coastal ecosystems

Understanding how nutrient limitation and plant traits influence carbon in mangrove‐seagrass coastal ecosystems

When nature needs a helping hand: Different levels of human intervention for mangrove (re-)establishment

Identifying trait‐based tolerance to sediment dynamics during seedling establishment across eight mangrove species

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