Tidal action and macroalgal photosynthetic activity prevent coastal acidification in an eutrophic system within a semi-desert region

Becherucci, María Eugenia; Pereyra, Patricio Javier; Narvarte, Maite Andrea; Fanjul, Eugenia; Iribarne, Oscar; Martinetto, Paulina

doi:10.1016/j.ecss.2021.107374

Cited by 4 publications

(4 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other factors, beside wave action, may also explain the observed differences in density and biomass of U. pinnatifida at our study sites. For example, the higher density and biomass at PV, compared at BSM, may be explained by the high nutrient concentration in San Antonio Bay (Becherucci et al., 2021; Martinetto et al., 2010). Undaria pinnatifida thrives in areas enriched with nitrogen and phosphorous (Castric‐Fey et al., 1999; Sfriso & Facca, 2013; Torres et al., 2004;) and therefore grows more prolifically at human‐impacted sites where nutrient levels are higher (Morelissen et al., 2013; Torres et al., 2004).…”

Section: Discussionmentioning

confidence: 99%

Same species, different population dynamics: Spatio‐temporal differences of Undaria pinnatifida (Ochrophyta, Phaeophyceae) in the intertidal of North Patagonia, Argentina

Arcángel,

Rodríguez,

Saad

et al. 2023

Journal of Phycology

View full text Add to dashboard Cite

Population dynamics can be influenced by physical and biological factors, particularly in stressful environments. Introduced species usually have great physiological plasticity, resulting in populations with different traits. Undaria pinnatifida, a macroalga originally described from northeast Asia, was introduced in Northern Patagonia, Argentina (San Matías Gulf) around 2010. To describe the spatio‐temporal variability in population structure and morphometry of U. pinnatifida, we conducted monthly field samplings for 2 years at the intertidal area of two contrasting sites in the San Matías Gulf. Individuals of U. pinnatifida were classified by developmental stage, and their morpho‐gravimetric variables were measured. In both intertidal sites juveniles were found in higher proportion during austral autumn and grew and matured during the autumn‐winter months (from May onwards), and individuals senesced during early austral summer (December and January). Conversely, density and biomass were largely different between sites, and individuals showed slight morphological variability between sites. Environmental (e.g., nutrient concentration, available substrate) and biological factors (e.g., facilitation, competition) may explain the observed differences. Since there is not a macroalga with U. pinnatifida morphometrical characteristics in the intertidal environments of San Matías Gulf, studying this recent introduction gives us a better understanding of its potential ecological effects.

show abstract

Section: Discussionmentioning

confidence: 99%

Same species, different population dynamics: Spatio‐temporal differences of Undaria pinnatifida (Ochrophyta, Phaeophyceae) in the intertidal of North Patagonia, Argentina

Arcángel,

Rodríguez,

Saad

et al. 2023

Journal of Phycology

View full text Add to dashboard Cite

show abstract

“…On the contrary, juvenile snails outside the canopy probably avoid predation because of their smaller sizes and consequently lower detectability while buried—or, alternatively, they may not constitute dietary items for the visual tactics predators. In addition, Ulva can modify the surrounding chemical conditions (e.g., Ulva detritus enhance sediment oxygen uptake, nitrification, and denitrification, García‐Robledo et al, 2013; Ulva blooms increase the surrounding pH, Becherucci et al, 2021), which may not be suitable for juveniles. We also expected that females bearing egg capsules would be differentially distributed under the canopy.…”

Section: Discussionmentioning

confidence: 99%

“…The detrimental effects of macroalgal blooms due to nutrient enrichment have been demonstrated by many studies, including negative effects both on natural communities and ecosystem functions (Fox et al, 2009; Lewis & De Witt, 2017; Österling & Pihl, 2001; Valiela et al, 1997) and on the goods and services of human use (Jessen et al, 2015; Lyons et al, 2014; Troell et al, 2005). Eutrophicated systems with a large water exchange (i.e., macrotidal) or at initial stages of eutrophication, however, can have positive effects on communities (Baldrighi et al, 2019; Becherucci et al, 2021; Martinetto et al, 2010; Quillien et al, 2015). The increase in primary production can support high densities of consumers (by increasing food availability) and provide shelter and new microhabitats for benthic macro‐ and meiofauna.…”

Section: Introductionmentioning

confidence: 99%

Living under Ulva canopy: The case of the scavenger snail Buccinastrum deforme in a eutrophic macrotidal bay in Patagonia (Argentina)

2022

View full text Add to dashboard Cite

Eutrophication results in macroalgal blooms with usually negative effects on the marine communities; nevertheless, positive and neutral effects have also been reported. We hypothesized that the macroalgal canopy plays an important role in secondary consumers like the scavenger snail Buccinastrum deforme through amelioration of physical stress and through carrion retention below the canopy. We evaluated if the canopy provided by Ulva spp. affected the habitat conditions and population traits of B. deforme in a macrotidal coastal system of North Patagonia. Our results indicated that the Ulva canopy was associated with lower desiccation, a higher abundance of crab carrions, and with larger and heavier snails. We did not, however, find differences in the sex ratio, the juvenile, and total density of B. deforme between microhabitats with and without an Ulva canopy. These results suggest that macroalgal canopy of Ulva has a modest ecological effect on B. deforme.

show abstract

“…Therefore, assess the potential of coastal ecosystems as modulators of ocean acidi cation and carbon sinks is a very active area of research. Both functions have been extensively characterized for seagrass meadows (Hendriks et al, 2014), macroalgae "forests" (Becherucci et al, 2021), mangrove forests (Sippo et al, 2016), and coral reefs (Anthony et al, 2013), but the natural variability of these systems makes it considerably di cult to extrapolate parameters between different locations (Van Dam et al, 2021). Changes in the pH of coastal zones respond to many forcing factors not necessarily related to ocean acidi cation, such as the ow of nutrients, environmental and land use transformations in continental basins, and changes in the structure and metabolism of the coastal ecosystems (Carstensen & Duarte, 2019;Duarte et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Carbonate system variation evidences the effect of seasonality in carbon uptake in a tropical seagrass meadow of South Caribbean

Bernal-Glen,

Bernal,

Mancera-Pineda

2024

Preprint

View full text Add to dashboard Cite

We explore the variation of the carbonate system in the water column over a seagrass meadow under ecological restoration and its correlation with Net Primary Production (NPP), Net Calcification (NC) and Eutrophication, in a small coralline island within the Seaflower International Biosphere Reserve, Colombian Caribbean. We assessed one point within seagrass and another devoid of seagrass, during dry and rainy seasons. Dry season was characterized by higher levels of pHT (total scale), descending levels of Dissolved Inorganic Carbon (CT) along the day, and net fluxes of carbon towards the ocean. Rainy season presented lower pHT values and carbonate variables not correlated with hour in the meadow, while the area presented fluxes of CO2 towards the atmosphere. NPP in the rainy season decreased by 39% in the point without seagrass and by 95% in the seagrass respect to dry season. NC in the meadow registered values 3.2x higher in dry season than in rainy season. These phenomena evidenced a shift in NPP from seagrass to water column, a strong remineralization process, and loss of sheltering function for calcifying organisms localized in the meadow during rainy season. These findings coincide with previous evaluations in the island, which have shown lower rates of seagrass growth and organic carbon accumulation in sediment during rainy season. Possible explanations include carbon import from adjacent ecosystems and influence of cultural eutrophication. Our results suggest the importance of runoff and eutrophication control to protect carbon sequestration ability and improve the outcome of ecological restoration processes in tropical seagrasses.

show abstract

Tidal action and macroalgal photosynthetic activity prevent coastal acidification in an eutrophic system within a semi-desert region

Cited by 4 publications

References 52 publications

Same species, different population dynamics: Spatio‐temporal differences of Undaria pinnatifida (Ochrophyta, Phaeophyceae) in the intertidal of North Patagonia, Argentina

Same species, different population dynamics: Spatio‐temporal differences of Undaria pinnatifida (Ochrophyta, Phaeophyceae) in the intertidal of North Patagonia, Argentina

Living under Ulva canopy: The case of the scavenger snail Buccinastrum deforme in a eutrophic macrotidal bay in Patagonia (Argentina)

Carbonate system variation evidences the effect of seasonality in carbon uptake in a tropical seagrass meadow of South Caribbean

Contact Info

Product

Resources

About