Development of the benthic macrofauna community after tidal restoration at Rammegors: final report

Research output: Book/ReportReportProfessional

Abstract

The managed realignment project Rammegors aims at re-establishing estuarine nature in a formerly freshwater wetland. For this purpose, a tidal inlet was constructed in the Krabbekreekdam to generate a reduced tidal influence that should allow the development of salt marsh area, tidal flat area and low energetic shallow sub-tidal area. A central question of the Rammegors tidal restoration project is how the flora and fauna will develop in the area. To understand the biotic and abiotic processes related to the tidal restoration in Rammegors, a monitoring programme is being executed by the Centre of Expertise Delta Technology. The monitoring focuses on the main biotic and abiotic developments in the area. This report only focuses on the early colonization of macrobenthic invertebrates in Rammegors. Benthic macrofauna and sediment sampling took place in spring and autumn 2017 and 2018 at twenty-four stations along 5 transects with varying distances from the inlet. A fast colonization of the benthic macrofauna was observed in Rammegors. Twenty-two taxa were observed in the area in spring 2017. The communities significantly differed between spring and autumn 2017. In spring densities reached high values, especially for the brackish mud shrimp Manocorophium insidiosum and mosquito larvae Chironomidae. In autumn these brackish species almost disappeared from the area. Their presence in autumn 2017 and spring 2018, even in low numbers, as well as the observation of the brackish cockle Cerastoderma glaucum indicate that a year after the tidal restoration, parts of Rammegors are still under influence of brackish water. In 2018 these species declined, indicating the transition to a marine environment. A significant relation was found between elevation and the benthic macrofauna. Total density, biomass and species richness showed a significant relation along the elevation gradient with an optimum around +0.4m NAP and lower values at both lower and higher elevations. Total density significant increases with an increase in chlorophyll-a, silt content and organic matter. A significant decrease in total density and species richness was observed with increasing bulk density, indicating that more compact sediments contain less species in lower abundances. Total density, biomass and species richness increased with increasing distance from the inlet. After two years, it is unknown if the community within the Rammegors area reached stability or develops at a slow pace. Future monitoring and a comparison to a community found in a comparable natural habitat is needed to study this.
Original languageEnglish
Place of PublicationYerseke
PublisherWageningen Marine Research
Number of pages23
DOIs
Publication statusPublished - Mar 2019

Publication series

NameWageningen Marine Research report
No.C042/19

Fingerprint

benthos
autumn
species richness
monitoring
colonization
managed realignment
tidal inlet
biomass
tidal flat
mosquito
brackish water
saltmarsh
sediment
bulk density
marine environment
chlorophyll a
silt
mud
flora
energetics

Cite this

Walles, B., Brummelhuis, E., van der Pool, J., & Ysebaert, T. (2019). Development of the benthic macrofauna community after tidal restoration at Rammegors: final report. (Wageningen Marine Research report; No. C042/19). Yerseke: Wageningen Marine Research. https://doi.org/10.18174/475790
Walles, Brenda ; Brummelhuis, Emiel ; van der Pool, Jesse ; Ysebaert, Tom. / Development of the benthic macrofauna community after tidal restoration at Rammegors: final report. Yerseke : Wageningen Marine Research, 2019. 23 p. (Wageningen Marine Research report; C042/19).
@book{1d887dc809a04b4d9fe2639d95376c34,
title = "Development of the benthic macrofauna community after tidal restoration at Rammegors: final report",
abstract = "The managed realignment project Rammegors aims at re-establishing estuarine nature in a formerly freshwater wetland. For this purpose, a tidal inlet was constructed in the Krabbekreekdam to generate a reduced tidal influence that should allow the development of salt marsh area, tidal flat area and low energetic shallow sub-tidal area. A central question of the Rammegors tidal restoration project is how the flora and fauna will develop in the area. To understand the biotic and abiotic processes related to the tidal restoration in Rammegors, a monitoring programme is being executed by the Centre of Expertise Delta Technology. The monitoring focuses on the main biotic and abiotic developments in the area. This report only focuses on the early colonization of macrobenthic invertebrates in Rammegors. Benthic macrofauna and sediment sampling took place in spring and autumn 2017 and 2018 at twenty-four stations along 5 transects with varying distances from the inlet. A fast colonization of the benthic macrofauna was observed in Rammegors. Twenty-two taxa were observed in the area in spring 2017. The communities significantly differed between spring and autumn 2017. In spring densities reached high values, especially for the brackish mud shrimp Manocorophium insidiosum and mosquito larvae Chironomidae. In autumn these brackish species almost disappeared from the area. Their presence in autumn 2017 and spring 2018, even in low numbers, as well as the observation of the brackish cockle Cerastoderma glaucum indicate that a year after the tidal restoration, parts of Rammegors are still under influence of brackish water. In 2018 these species declined, indicating the transition to a marine environment. A significant relation was found between elevation and the benthic macrofauna. Total density, biomass and species richness showed a significant relation along the elevation gradient with an optimum around +0.4m NAP and lower values at both lower and higher elevations. Total density significant increases with an increase in chlorophyll-a, silt content and organic matter. A significant decrease in total density and species richness was observed with increasing bulk density, indicating that more compact sediments contain less species in lower abundances. Total density, biomass and species richness increased with increasing distance from the inlet. After two years, it is unknown if the community within the Rammegors area reached stability or develops at a slow pace. Future monitoring and a comparison to a community found in a comparable natural habitat is needed to study this.",
author = "Brenda Walles and Emiel Brummelhuis and {van der Pool}, Jesse and Tom Ysebaert",
note = "Project number 4313100022. - BAS code KB-24-001-015",
year = "2019",
month = "3",
doi = "10.18174/475790",
language = "English",
series = "Wageningen Marine Research report",
publisher = "Wageningen Marine Research",
number = "C042/19",

}

Development of the benthic macrofauna community after tidal restoration at Rammegors: final report. / Walles, Brenda; Brummelhuis, Emiel; van der Pool, Jesse; Ysebaert, Tom.

Yerseke : Wageningen Marine Research, 2019. 23 p. (Wageningen Marine Research report; No. C042/19).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Development of the benthic macrofauna community after tidal restoration at Rammegors: final report

AU - Walles, Brenda

AU - Brummelhuis, Emiel

AU - van der Pool, Jesse

AU - Ysebaert, Tom

N1 - Project number 4313100022. - BAS code KB-24-001-015

PY - 2019/3

Y1 - 2019/3

N2 - The managed realignment project Rammegors aims at re-establishing estuarine nature in a formerly freshwater wetland. For this purpose, a tidal inlet was constructed in the Krabbekreekdam to generate a reduced tidal influence that should allow the development of salt marsh area, tidal flat area and low energetic shallow sub-tidal area. A central question of the Rammegors tidal restoration project is how the flora and fauna will develop in the area. To understand the biotic and abiotic processes related to the tidal restoration in Rammegors, a monitoring programme is being executed by the Centre of Expertise Delta Technology. The monitoring focuses on the main biotic and abiotic developments in the area. This report only focuses on the early colonization of macrobenthic invertebrates in Rammegors. Benthic macrofauna and sediment sampling took place in spring and autumn 2017 and 2018 at twenty-four stations along 5 transects with varying distances from the inlet. A fast colonization of the benthic macrofauna was observed in Rammegors. Twenty-two taxa were observed in the area in spring 2017. The communities significantly differed between spring and autumn 2017. In spring densities reached high values, especially for the brackish mud shrimp Manocorophium insidiosum and mosquito larvae Chironomidae. In autumn these brackish species almost disappeared from the area. Their presence in autumn 2017 and spring 2018, even in low numbers, as well as the observation of the brackish cockle Cerastoderma glaucum indicate that a year after the tidal restoration, parts of Rammegors are still under influence of brackish water. In 2018 these species declined, indicating the transition to a marine environment. A significant relation was found between elevation and the benthic macrofauna. Total density, biomass and species richness showed a significant relation along the elevation gradient with an optimum around +0.4m NAP and lower values at both lower and higher elevations. Total density significant increases with an increase in chlorophyll-a, silt content and organic matter. A significant decrease in total density and species richness was observed with increasing bulk density, indicating that more compact sediments contain less species in lower abundances. Total density, biomass and species richness increased with increasing distance from the inlet. After two years, it is unknown if the community within the Rammegors area reached stability or develops at a slow pace. Future monitoring and a comparison to a community found in a comparable natural habitat is needed to study this.

AB - The managed realignment project Rammegors aims at re-establishing estuarine nature in a formerly freshwater wetland. For this purpose, a tidal inlet was constructed in the Krabbekreekdam to generate a reduced tidal influence that should allow the development of salt marsh area, tidal flat area and low energetic shallow sub-tidal area. A central question of the Rammegors tidal restoration project is how the flora and fauna will develop in the area. To understand the biotic and abiotic processes related to the tidal restoration in Rammegors, a monitoring programme is being executed by the Centre of Expertise Delta Technology. The monitoring focuses on the main biotic and abiotic developments in the area. This report only focuses on the early colonization of macrobenthic invertebrates in Rammegors. Benthic macrofauna and sediment sampling took place in spring and autumn 2017 and 2018 at twenty-four stations along 5 transects with varying distances from the inlet. A fast colonization of the benthic macrofauna was observed in Rammegors. Twenty-two taxa were observed in the area in spring 2017. The communities significantly differed between spring and autumn 2017. In spring densities reached high values, especially for the brackish mud shrimp Manocorophium insidiosum and mosquito larvae Chironomidae. In autumn these brackish species almost disappeared from the area. Their presence in autumn 2017 and spring 2018, even in low numbers, as well as the observation of the brackish cockle Cerastoderma glaucum indicate that a year after the tidal restoration, parts of Rammegors are still under influence of brackish water. In 2018 these species declined, indicating the transition to a marine environment. A significant relation was found between elevation and the benthic macrofauna. Total density, biomass and species richness showed a significant relation along the elevation gradient with an optimum around +0.4m NAP and lower values at both lower and higher elevations. Total density significant increases with an increase in chlorophyll-a, silt content and organic matter. A significant decrease in total density and species richness was observed with increasing bulk density, indicating that more compact sediments contain less species in lower abundances. Total density, biomass and species richness increased with increasing distance from the inlet. After two years, it is unknown if the community within the Rammegors area reached stability or develops at a slow pace. Future monitoring and a comparison to a community found in a comparable natural habitat is needed to study this.

U2 - 10.18174/475790

DO - 10.18174/475790

M3 - Report

T3 - Wageningen Marine Research report

BT - Development of the benthic macrofauna community after tidal restoration at Rammegors: final report

PB - Wageningen Marine Research

CY - Yerseke

ER -

Walles B, Brummelhuis E, van der Pool J, Ysebaert T. Development of the benthic macrofauna community after tidal restoration at Rammegors: final report. Yerseke: Wageningen Marine Research, 2019. 23 p. (Wageningen Marine Research report; C042/19). https://doi.org/10.18174/475790