Determination of food web support and trophic position of the mummichog,Fundulus heteroclitus, in New Jersey smooth cordgrass (Spartina alterniflora), common reed (Phragmites australis), and restored salt marshes

Estuaries ◽  
2003 ◽  
Vol 26 (2) ◽  
pp. 495-510 ◽  
Author(s):  
C. A. Currin ◽  
S. C. Wainright ◽  
K. W. Able ◽  
M. P. Weinstein ◽  
C. M. Fuller
Keyword(s):  
New Jersey ◽  
Food Web ◽  
Spartina Alterniflora ◽  
Phragmites Australis ◽  
Salt Marshes ◽  
Fundulus Heteroclitus ◽  
Trophic Position ◽  
Common Reed ◽  
Smooth Cordgrass

scholarly journals Impact of reed harvesting and Smooth Cordgrass Spartina alterniflora invasion on nesting Reed Parrotbill Paradoxornis heudei

2010 ◽  
Vol 21 (1) ◽  
pp. 25-35 ◽  
Author(s):  
ANTHONY BOULORD ◽  
TIAN-HOU WANG ◽  
XIAO-MING WANG ◽  
GUO-XIAN SONG
Keyword(s):  
East Asia ◽  
Spartina Alterniflora ◽  
Phragmites Australis ◽  
Vegetation Cover ◽  
Common Reed ◽  
Smooth Cordgrass ◽  
Nesting Sites ◽  
Almost All ◽  
Shanghai Municipality ◽  
Spartina Alterniflora Invasion

SummaryThe Reed Parrotbill Paradoxornis heudei is an endemic reedbed-inhabiting passerine of east Asia. In the Shanghai municipality, which harbours significant populations of this species, almost all reedbed surfaces are annually harvested. Furthermore, the reedbeds are being invaded by Smooth Cordgrass Spartina alterniflora, an introduced species that can outcompete the native Common Reed Phragmites australis. In this paper, we have shown that Reed Parrotbills do not nest in areas dominated by Smooth Cordgrass and avoid using them. In the areas that are primarily composed of Common Reed, the densities of birds are higher in the unharvested sections. The birds appear to select nesting sites with low Smooth Cordgrass densities, tall reed stems, and relatively equal densities of both dry and green stems. Reed harvesting activity results in vegetation that is too low for bird nesting. However, no nests were found in areas where the reeds had not been harvested for several years and had high densities of dry reed stems; these results could be attributed to the fact that the high density of broken stems reduced the vegetation cover. On the basis of our results, we recommend implementation of four years harvesting-cycle rotation and avoidance of reclamation in reedbeds which have not been invaded by Smooth Cordgrass.

scholarly journals The Impact of Sea Embankment Reclamation on Greenhouse Gas GHG Fluxes and Stocks in Invasive Spartina alterniflora and Native Phragmites australis Wetland Marshes of East China

2021 ◽  
Vol 13 (22) ◽  
pp. 12740
Author(s):  
Jian Li ◽  
Zhanrui Leng ◽  
Yueming Wu ◽  
Guanlin Li ◽  
Guangqian Ren ◽  
...  
Keyword(s):  
Salt Marsh ◽  
Greenhouse Gas ◽  
Spartina Alterniflora ◽  
Phragmites Australis ◽  
Salt Marshes ◽  
Coastal Wetlands ◽  
Organic N ◽  
C And N ◽  
The Impact ◽  
Ghg Fluxes

The introduction of embankment seawalls to limit the expansion of the exotic C4 perennial grass Spartina alteniflora Loisel in eastern China’s coastal wetlands has more than doubled in the past decades. Previous research focused on the impact of sea embankment reclamation on the soil organic carbon (C) and nitrogen (N) stocks in salt marshes, whereas no study attempted to assess the impact of sea embankment reclamation on greenhouse gas (GHG) fluxes in such marshes. Here we examined the impact of sea embankment reclamation on GHG stocks and fluxes of an invasive Spartina alterniflora and native Phragmites australis dominated salt marsh in the Dongtai wetlands of China’s Jiangsu province. Sea embankment reclamation significantly decreased soil total organic C by 54.0% and total organic N by 73.2%, decreasing plant biomass, soil moisture, and soil salinity in both plants’ marsh. It increased CO2 emissions by 38.2% and 13.5%, and reduced CH4 emissions by 34.5% and 37.1%, respectively, in the Spartina alterniflora and Phragmites australis marshes. The coastal embankment wall also significantly increased N2O emission by 48.9% in the Phragmites australis salt marsh and reduced emissions by 17.2% in the Spartina alterniflora marsh. The fluxes of methane CH4 and carbon dioxide CO2 were similar in both restored and unrestored sections, whereas the fluxes of nitrous oxide N2O were substantially different owing to increased nitrate as a result of N-loading. Our findings show that sea embankment reclamation significantly alters coastal marsh potential to sequester C and N, particularly in native Phragmites australis salt marshes. As a result, sea embankment reclamation essentially weakens native and invasive saltmarshes’ C and N sinks, potentially depleting C and N sinks in coastal China’s wetlands. Stakeholders and policymakers can utilize this scientific evidence to strike a balance between seawall reclamation and invasive plant expansion in coastal wetlands.

Positive interactions of the smooth cordgrass Spartina alterniflora on the mud snail Heleobia australis, in South Western Atlantic salt marshes

2007 ◽  
Vol 353 (2) ◽  
pp. 180-190 ◽  
Author(s):  
Alejandro D. Canepuccia ◽  
Mauricio Escapa ◽  
Pedro Daleo ◽  
Juan Alberti ◽  
Florencia Botto ◽  
...  
Keyword(s):  
Spartina Alterniflora ◽  
Salt Marshes ◽  
Positive Interactions ◽  
Smooth Cordgrass ◽  
Western Atlantic ◽  
Mud Snail
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