Interactions between biotic and abiotic processes determine biogeomorphology in Yangtze Estuary coastal marshes: Observation with a modeling approach

Li, Shihua; Ge, Zheng–Ming; Xin, Pei; Tan, Lishan; Li, Ya-Lei; Xie, Lian

doi:10.1016/j.geomorph.2021.107970

Cited by 10 publications

(4 citation statements)

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“…Therefore, subtle shifts between opportunities and risks in biophysical processes would facilitate formation of various salt marsh landscapes. Decreased sediment challenges salt marsh conservation, spanning from monthly or seasonal (Lacy et al 2020) to annual and decadal (Li et al 2021) scale. Our results illustrated that low SSC hampers sediment retention near marsh edges (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…At the landscape level, unique land covers are created as a result of spatial heterogeneities in environmental factors (Perry 2002;Moffett et al 2012;Stein et al 2014). Site-specific variables such as sediment supply and geomorphology may result in distinct trajectories of marsh development (Mariotti and Carr 2014;Schuerch et al 2014;Li et al 2021). Additionally, infrequent but abrupt disturbances (e.g., storms and peak riverine runoffs) bring uncertainties to marsh evolution (Wang et al 2016;Leonardi et al 2018).…”

Section: Introductionmentioning

confidence: 99%

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Short-term evolution pattern in salt marsh landscapes: the importance of physical constraints

Xue,

Li,

et al. 2024

Landsc Ecol

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Context Salt marsh landscapes at the land-sea interfaces exhibit contrasting spatiotemporal dynamics, resulting from varying physical constraints that limit new marsh establishment. The expansion of salt marsh landscapes towards the sea or their retreat towards the land is determined by patch-level changes, relying on the balance of power between the intrinsic biota traits and external physical disturbances. Objectives Examine how marsh dynamics respond to physical constraints, and clarify the pathway from coupled physical processes involving hydrodynamic forces, sediment transport, and morphological changes to rapid patch evolution and landscape changes. Methods We defined and distinguished four types of marsh changes based on patch proximities from five-month drone images in two typical marsh pioneer zones of the Yangtze Estuary, China: outlying expansion, edge expansion, infilling expansion, and retreat. Hydrodynamics and sediment transport were synchronously measured and compared near the two marsh edges, and morphological changes were generated by drone-derived digital elevation models (DEMs). Results We identified distinct seasonal patterns of net marsh expansion at the accretion-prone site, that is: Net marsh expansion started from the outlying expansion in spring, followed by edge expansion in summer and infilling expansion in autumn. However, at the erosion-prone site that experienced high bed shear stress, low sediment availability and high seaward sediment transport, we only observed limited infilling and edge expansion in spring. This suggests that the potential for long-distance patch formation beyond the initial marsh edges is diminished in areas subjected to intensive physical disturbances. Conclusions Patch evolution dynamics in response to site-specific physical constraints drive state differentiation of salt marsh landscape changes. Consequently, the heterogeneous evolution in salt marsh landscapes should be taken into account in restoration practice.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Short-term evolution pattern in salt marsh landscapes: the importance of physical constraints

Xue,

Li,

et al. 2024

Landsc Ecol

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“…The existing interdependences between plant dynamics and morphological evolution of salt marshes are complex and depend on a number of concurrent factors, not always easy to differentiate. As in the case of dune systems, salt marshes are considered as typical cases of biogeomorphological systems, especially under tropical climates (Li et al, 2021). In fact, salt marsh reclamation or the removal of vegetation from marshes usually has the same consequence as the effects of strong currents and waves: shoreline erosion and retreat (Brunier et al, 2019;Zhang et al, 2021;Evans et al, 2022).…”

Section: Low Sedimentary Coasts: Barrier Islands Lagoons Salt Marshes...mentioning

confidence: 99%

The complexity of studying coasts: From forms and processes to management

Prieto

2022

CIG

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Coastal environments are characterized by their high dynamism, related to the interaction between marine agents (winds, waves, currents, sea level changes) and continental forms and processes. The present article summarizes the main morphodynamic characteristics of coasts and the resulting environments. Different oscillations of the sea level are considered, depending on their amplitude and frequency: rapid eustatic fluctuations, energetic tsunamis, storm waves and surges, tides and good weather wind waves. Coastal environments are classified in low, sedimentary coasts, including beaches, dunes, barrier islands, lagoons, salt marshes and river mouths, and high, rocky coasts. Management of coastal zones needs a deep knowledge of all the processes involved at the littoral, especially at the local scale, since coastal processes vary rapidly alongshore. At present the integrated coastal management intends to involve different socioeconomic sectors interested in the occupation and use of coasts. Coastal management must include the adaptation of human activities to the natural processes and associated coastal hazards and the protection of coastal values, both of natural and historical-cultural character. Public administrations at different levels should consider the knowledge of the coastal processes at different scales and their potential interaction with human activities in order to design laws and regulations accordingly.

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Section: Low Sedimentary Coasts: Barrier Islands Lagoons Salt Marshes...mentioning

confidence: 99%

Untitled

2022

CIG

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Consejo Editorial / Editorial Board is a scienti ronmental sciences (Hydrology, Ecology, Climatology). Interdisciplinary studies with Human Geography are also welcome. The peer review and publication of articles in Cuadernos de Investigación Geográfica is free of Since 2015 has been included in the Emerging Sources Citation Index (ESCI) of Clarivate Analytics, a new edition of the Web of Science, Geography (Physical) mental Sciences, and Earth and Planetary Sciences.

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Interactions between biotic and abiotic processes determine biogeomorphology in Yangtze Estuary coastal marshes: Observation with a modeling approach

Cited by 10 publications

References 61 publications

Short-term evolution pattern in salt marsh landscapes: the importance of physical constraints

Short-term evolution pattern in salt marsh landscapes: the importance of physical constraints

The complexity of studying coasts: From forms and processes to management

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