scholarly journals Aquatic Vegetation Loss and Its Implication on Climate Regulation in a Protected Freshwater Wetland of Po River Delta Park (Italy)

Water ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 117
Author(s):  
Mattias Gaglio ◽  
Mariano Bresciani ◽  
Nicola Ghirardi ◽  
Alexandra Nicoleta Muresan ◽  
Mattia Lanzoni ◽  
...  
Keyword(s):  
Carbon Sequestration ◽  
Aquatic Vegetation ◽  
Ecosystem Processes ◽  
River Delta ◽  
Freshwater Wetland ◽  
Total Biomass ◽  
Po River ◽  
Breakdown Rates ◽  
Vegetation Loss ◽  
And Storage

Aquatic vegetation loss caused substantial decrease of ecosystem processes and services during the last decades, particularly for the capacity of these ecosystems to sequester and store carbon from the atmosphere. This study investigated the extent of aquatic emergent vegetation loss for the period 1985–2018 and the consequent effects on carbon sequestration and storage capacity of Valle Santa wetland, a protected freshwater wetland dominated by Phragmites australis located in the Po river delta Park (Northern Italy), as a function of primary productivity and biomass decomposition, assessed by means of satellite images and experimental measures. The results showed an extended loss of aquatic vegetated habitats during the considered period, with 1989 being the year with higher productivity. The mean breakdown rates of P. australis were 0.00532 d−1 and 0.00228 d−1 for leaf and stem carbon content, respectively, leading to a predicted annual decomposition of 64.6% of the total biomass carbon. For 2018 the carbon sequestration capacity was estimated equal to 0.249 kg C m−2 yr−1, while the carbon storage of the whole wetland was 1.75 × 103 t C (0.70 kg C m−2). Nonetheless, despite the protection efforts over time, the vegetation loss occurred during the last decades significantly decreased carbon sequestration and storage by 51.6%, when comparing 2018 and 1989. No statistically significant effects were found for water descriptors. This study demonstrated that P. australis-dominated wetlands support important ecosystem processes and should be regarded as an important carbon sink under an ecosystem services perspective, with the aim to maximize their capacity to mitigate climate change.

scholarly journals Phragmites Australis Invasion and Herbicide Treatment Changes Freshwater Wetland Carbon Dynamics

2021 ◽  
Author(s):  
Sarah Jennifer Yuckin ◽  
Graham Howell ◽  
Courtney Dawn Robichaud ◽  
Rebecca Campbell Rooney
Keyword(s):  
Phragmites Australis ◽  
Aquatic Vegetation ◽  
Invasive Plant ◽  
Net Primary Productivity ◽  
Relative Rate ◽  
Carbon Assimilation ◽  
Freshwater Wetland ◽  
Total Biomass ◽  
Carbon Budgets ◽  
Decomposition Rates

Abstract Wetland carbon budgets largely depend on the wetland communities’ relative rate of carbon assimilation and carbon emission. Invasive plants with growth or decomposition patterns that differ from reference plant communities may shift wetland carbon budgets, as may invasive plant suppression efforts. For example, Phragmites australis (European Common Reed), which replaces meadow and cattail marsh in the Laurentian Great Lakes area, has high biomass production and foliar nitrogen, can modify the environment conditions that effect decomposition rates, creates thick stands of slowly decomposing standing dead stems, and is often controlled using broad-spectrum herbicides. Our objectives were to determine if P. australis control efforts in freshwater coastal marshes were sufficient to return net primary productivity, decomposition rates, and environmental conditions to within their pre-invasion range. We find that P. australis invasion had the greatest effect on carbon sequestration when replacing meadow marsh, as opposed to cattail marsh. We conclude that control efforts, one-year post-treatment, dramatically reduce total biomass and carbon assimilation compared to meadow and cattail marsh. However, floating and submersed aquatic vegetation rapidly colonized treated areas, suggesting that continuing plant community recovery may restore the carbon budget in subsequent years.

scholarly journals Carbon sequestration and storage potential of urban green in residential yards: A case study from Helsinki

2021 ◽  
Vol 57 ◽  
pp. 126939
Author(s):  
Mari Ariluoma ◽  
Juudit Ottelin ◽  
Ranja Hautamäki ◽  
Eeva-Maria Tuhkanen ◽  
Miia Mänttäri
Keyword(s):  
Carbon Sequestration ◽  
Urban Green ◽  
Residential Yards ◽  
Storage Potential ◽  
And Storage

scholarly journals Potential of Alnus acuminata based agroforestry for carbon sequestration and other ecosystem services in Rwanda

2021 ◽  
Author(s):  
Athanase R. Cyamweshi ◽  
Shem Kuyah ◽  
Athanase Mukuralinda ◽  
Catherine W. Muthuri
Keyword(s):  
Ecosystem Services ◽  
Carbon Sequestration ◽  
Soil Fertility ◽  
Tree Age ◽  
Average Height ◽  
Total Biomass ◽  
Biomass Carbon ◽  
Alnus Acuminata ◽  
Sequestration Potential ◽  
Old Trees

AbstractAlnus acuminata Kunth. (alnus) is widely used in agroforestry systems across the globe and is believed to provide multiple ecosystem services; however, evidence is lacking in agroforestry literature to support the perceived benefits, particularly in Rwanda. To understand carbon sequestration potential and other benefits of alnus, a household survey, tree inventory and destructive sampling were conducted in north-western Rwanda. Over 75% of the respondents had alnus trees in their farms. The trees provide stakes for climbing beans, firewood and timber. They also improve soil fertility and control soil erosion. Farmers had between 130 and 161 alnus trees per hectare with an average height of 7.7 ± 0.59 m and diameter at breast height of 16.3 ± 1.39 cm. The largest biomass proportion was found in stems (70.5%) while branches and leaves stock about 16.5 and 13% of the total biomass, respectively. At farm level, aboveground biomass of alnus trees was estimated to be 27.2 ± 0.7 Mg ha−1 representing 13.6 Mg of carbon (C) per hectare. Biomass carbon increased with tree size, from 7.1 ± 0.2 Mg C ha−1 in 3 years old trees to 34.4 ± 2.2 Mg C ha−1 in 10 years old trees. The converse was observed with elevation; biomass carbon decreased with increasing elevation from 21.4 ± 1.29 Mg C ha−1 at low (2011–2110 m) to 9.6 ± 0.75 Mg C ha−1 in the high elevation (> 2510 m). In conclusion, alnus agroforestry significantly contributes to carbon sequestration, although the magnitude of these benefits varies with tree age and elevation. Planting alnus trees on farms can meet local needs for stakes for climbing beans, wood and soil fertility improvement, as well as the global need for regulation of climate change.

Length-weight relationships of three estuarine species in the Comacchio Lagoon, Po River delta, Italy

2016 ◽  
Vol 32 (6) ◽  
pp. 1284-1285 ◽  
Author(s):  
M. Lanzoni ◽  
A. Gavioli ◽  
V. Aschonitis ◽  
M. Merighi ◽  
E. A. Fano ◽  
...  
Keyword(s):  
River Delta ◽  
Po River ◽  
Estuarine Species

Carbon sequestration and storage in planted mangrove stands of Avicennia marina

2021 ◽  
Vol 43 ◽  
pp. 101701
Author(s):  
Kathiresan Kandasamy ◽  
Narendran Rajendran ◽  
Balasubramaniyan Balakrishnan ◽  
Ramanathan Thiruganasambandam ◽  
Rajendran Narayanasamy
Keyword(s):  
Carbon Sequestration ◽  
Avicennia Marina ◽  
And Storage

Carbon sequestration and storage value of coffee forest in Southwestern Ethiopia

2021 ◽  
pp. 1-18
Author(s):  
Ayehu Fekadu Hailu ◽  
Teshome Soremessa ◽  
Bikila Warkineh Dullo
Keyword(s):  
Carbon Sequestration ◽  
Southwestern Ethiopia ◽  
And Storage

scholarly journals The effect of ice phenology exerted on submerged macrophytes through physicochemical parameters and the phytoplankton abundance

2015 ◽  
Author(s):  
Wojciech Ejankowski ◽  
Tomasz Lenard
Keyword(s):  
Physicochemical Parameters ◽  
Aquatic Vegetation ◽  
Myriophyllum Spicatum ◽  
Ice Cover ◽  
Water Transparency ◽  
Ceratophyllum Demersum ◽  
Total Biomass ◽  
Eutrophic Lakes ◽  
Macrophyte Species ◽  
Tn:Tp Ratio

<p>The physicochemical parameters of water, the concentration of chlorophyll-<em>a</em> and the submerged aquatic vegetation (SAV) were studied to evaluate the effects of different winter seasons on the biomass of macrophytes in shallow eutrophic lakes. We hypothesised that a lack of ice cover or early ice-out can influence the physicochemical parameters of water and thus change the conditions for the development of phytoplankton and SAV. The studies were conducted in four lakes of the Western Polesie region in mid-eastern Poland after mild winters with early ice-out (MW, 2011 and 2014) and after cold winters with late ice-out (CW, 2010, 2012 and 2013). The concentrations of soluble and total nitrogen, chlorophyll-<em>a</em> and the TN:TP ratio in the lakes were considerably higher, whereas the concentration of soluble and total phosphorus and water transparency were significantly lower after the MW compared with after the CW. No differences were found in water temperature, reaction and electrolytic conductivity. Low water turbidity linked with low concentration of chlorophyll-<em>a</em> after the CW resulted in increased water transparency and the total biomass of the SAV. The negative effect of the MW on the macrophyte species was stronger on more sensitive species (<em>Myriophyllum spicatum</em>,<em> Stratiotes aloides</em>) compared with shade tolerant <em>Ceratophyllum demersum</em>. Our findings show that the ice cover phenology affected by climate warming can change the balance between phytoplankton and benthic vegetation in shallow eutrophic lakes, acting as a shift between clear and turbid water states. We speculate that various responses of macrophyte species to changes in the water quality after two winter seasons (CW and MW) could cause alterations in the vegetation biomass, particularly the expansion of shade tolerance and the decline of light-demanding species after a series of mild winters.</p>

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