Ecosystem engineering by annual intertidal seagrass beds: Sediment accretion and modification

Bos, Arthur R.; Bouma, Tjeerd J.; Kort, Geertje L.J. de; Katwijk, M.M. van

doi:10.1016/j.ecss.2007.04.006

Cited by 280 publications

(180 citation statements)

References 34 publications

(42 reference statements)

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“…The large carbon burial capacity documented for seagrass meadows is strengthened by the role of their canopies in enhancing sediment deposition (Gacia et al 2002). Seagrasses alter their surrounding physical habitat, since their canopies attenuate turbulence and reduce water flow (Koch et al 2006), promoting fluxes of particles to the bed (Hendriks et al 2008) enhancing sedimentation (Koch et al 2006;Bos et al 2007) and preventing resuspension (Gacia and Duarte 2001). These intrinsic properties of macrophyte canopies act to stabilize sediments, reduce erosion and turbidity of the overlying water column (Madsen et al 2001), strongly influencing near-shore sediment dynamics (Marba et al 2002;van der Heide et al 2007).…”

Section: Introductionmentioning

confidence: 99%

Effects of seagrasses and algae of the Caulerpa family on hydrodynamics and particle-trapping rates

et al. 2009

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The widespread decline of seagrass beds within the Mediterranean often results in the replacement of seagrasses by opportunistic green algae of the Caulerpa family. Because Caulerpa beds have a different height, stiffness and density compared to seagrasses, these changes in habitat type modify the interaction of the seafloor with hydrodynamics, influencing key processes such as sediment resuspension and particle trapping. Here, we compare the effects on hydrodynamics and particle trapping of Caulerpa taxifolia, C. racemosa, and C. prolifera with the Mediterranean seagrasses Cymodocea nodosa and Posidonia oceanica. All macrophyte canopies reduced near-bed volumetric flow rates compared to bare sediment, vertical profiles of turbulent kinetic energy revealed peak values around the top of the canopies, and maximum values of Reynolds stress increased by a factor of between 1.4 (C. nodosa) and 324

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Section: Introductionmentioning

confidence: 99%

Effects of seagrasses and algae of the Caulerpa family on hydrodynamics and particle-trapping rates

et al. 2009

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“…Seagrass meadows are important features of coastal ecosystems (Hemminga and Duarte, 2000) and are increasingly recognized for their vital role as ecosystem engineers, because their structure and biomass reduce hydrodynamic energy (e.g., Bouma et al, 2005), increase sedimentation (e.g., Gacia et al, 2003;Bos et al, 2007) and stabilize sediments (Fonseca, 1989), preventing coastal erosion (e.g., Adriano et al, 2005) and increasing water clarity (Maxwell et al, 2016). Moreover, seagrass meadows constitute significant carbon stocks (Duarte et al, 2013), serve as habitats and hatching/nursery areas for a wealth of organisms, and are an important source of food for herbivores such as nonbreeding herbivorous waterbirds (Baldwin and Lovvorn, 1994;Ganter, 2000;Heck and Valentine, 2006).…”

Section: Introductionmentioning

confidence: 99%

Long-term Patterns of Eelgrass (Zostera marina) Occurrence and Associated Herbivorous Waterbirds in a Danish Coastal Inlet

et al. 2017

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Seagrasses in coastal areas have substantial importance for the marine environment and also serve as food for herbivorous waterbirds. We investigated potential relationships between the autumn population of herbivorous waterbirds and eelgrass (Zostera marina) abundance in the EU protected area, Nibe-Gjøl Bredning, a broad of the Limfjorden estuarine complex in Denmark.This is an important site for migratory herbivorous waterbirds such as mute swan (Cygnus olor), coot (Fulica atra), brent goose (Branta bernicla), and wigeon (Anas penelope). We explored long-term (27 years) changes in eelgrass and bird-populations and relationships between eelgrass-and bird abundance. We applied trend-and correlative analyses of yearly monitoring data on eelgrass and waterbirds between 1989 and 2015 coupled with estimates of the potential grazing pressure exerted by the birds. Around 1990 eelgrass was abundant in this area covering more than 40 km 2 , but eelgrass coverage and biomass declined drastically around 1995 and remained low until 2011 when natural recolonization accelerated and by 2015 had restored the lost meadows. The number of herbivorous waterbirds also fluctuated substantially during the monitoring period with large abundance until the mid-end 1990s followed by reduced abundance in the 2000s and recovery after 2010. The number of bird-days showed a positive relationship with the same year's eelgrass abundance in the 1-2 m depth stratum. For the 0-1 m depth stratum, where the eelgrass meadows are most exposed to bird grazing but also to physical control from e.g., wind and ice, only a particularly detailed eelgrass data set available for a subset of the study period, showed a significant relationship with bird grazing. The potential waterbird consumption of eelgrass, estimated by multiplying average intake rate and number of bird-days for each species, ranged from less than 16% of the eelgrass biomass in most years to more than 40% of the eelgrass biomass in years with extremely sparse eelgrass populations. Hence, the study suggests that dense eelgrass populations stimulate herbivorous waterbirds whereas top-down control is only likely when abundant bird populations graze on sparse eelgrass populations.

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“…반면, 퇴적물의 영양염이 부족한 해역에서는 퇴적물 내 비료를 주입하여 잘피의 성장을 촉 진시키기도 하였다 (Lee and Dunton, 2000). 안정적인 잘피 서식지에서 잘피의 잎은 유속을 감소시키고, 퇴 적물의 재부유를 막아주어 수층을 맑게 하고, 잘피의 지하경과 뿌 리는 퇴적층을 안정화시켜 연안 침식을 감소시킨다 (Gacia and Duarte, 2001;Bos et al, 2007). 또한, 적절한 퇴적과 침식은 수 직 지하경(vertical rhizome)을 보유한 Cymodocea nodosa의 지하경 성장을 촉진시키기도 하나 (Marbà and Duarte, 1994), 과도한 퇴 적과 침식은 잘피의 원활한 생장을 방해하여 사망에 이르게 하기 도 한다 (Manzanera et al, 1998;Mills and Fonseca, 2003).…”

Section: 고 찰unclassified

Growth and Population Dynamics of Zostera marina Due to Changes in Sediment Composition in the Seomjin Estuary, Korea

Kim¹,

Park²,

Lee³

et al. 2015

The Sea

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The growth and population dynamics of eelgrass (Zostera marina) due to changes in sediment composition were examined in the lower intertidal zone of the Seomjin Estuary, Korea. We surveyed environmental factors such as water temperature, underwater irradiance, main types and organic content of sediment, tidal exposure, and nutrient concentrations in the water column and sediment pore water, in relation to the shoot density, biomass, morphological characteristics, and growth of Z. marina inhabiting lower intertidal zones.

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Ecosystem engineering by annual intertidal seagrass beds: Sediment accretion and modification

Cited by 280 publications

References 34 publications

Effects of seagrasses and algae of the Caulerpa family on hydrodynamics and particle-trapping rates

Effects of seagrasses and algae of the Caulerpa family on hydrodynamics and particle-trapping rates

Long-term Patterns of Eelgrass (Zostera marina) Occurrence and Associated Herbivorous Waterbirds in a Danish Coastal Inlet

Growth and Population Dynamics of Zostera marina Due to Changes in Sediment Composition in the Seomjin Estuary, Korea

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