Abundance of biofilm on intertidal rocky shores: Can trampling by humans be a negative influence?

Leite, Lucas G.; Ciotti, Áurea Maria; Christofoletti, Ronaldo Adriano

doi:10.1016/j.marenvres.2012.06.001

Cited by 9 publications

(3 citation statements)

References 55 publications

(81 reference statements)

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“…Reflecting the ecological importance of biofilms in marine environments, their colonisation mechanisms and drivers have been widely studied (Huang and Boney 1984;Hutchinson et al 2006;Briand et al 2012; on soft substrata (Jesus et al 2006;Orvain et al 2012;Morelle et al 2021) or hard substrata (Anderson 1995;Bulleri 2005;Leite et al 2012). However, only a few authors have investigated the impact of micro-topography, roughness, on biofilm adhesion and colonisation (Chung et al 2007;Doghri et al 2015) in marine ecosystems even though these aspects have been widely explored in medical sciences (Oh et al 2009;Perera-Costa et al 2014).…”

Section: Q2mentioning

confidence: 99%

Influence of infrastructure material composition and microtopography on marine biofilm growth and photobiology

et al. 2021

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The impact of concrete composition and roughness on the formation of microalgal biofilms and their photobiology were studied on marine infrastructures presenting four different compositions combined with two degrees of roughness (rough and smooth). The structures were first inoculated with a natural microphytobenthic biofilm and immersed in sterilised seawater with a controlled photoperiod for six days. Photosynthetic activity was assessed with an imaging PAM-(Pulse Amplitude Modulated) fluorometer and microtopography was monitored in parallel with a 3-D camera. The results indicated that roughness had an impact on the biofilm biomass, its physiological status and its photosynthetic efficiency and capacity. The assessment of surface roughness indicated that negative reliefs were preferably colonised by MPB (microphytobenthos) cells with better photosynthetic performances. Moreover, MPB biofilms showed better photoacclimation in these microhabitats than on the positive and smooth reliefs. This study confirms the importance of microhabitat for biofilm formation and their photobiology.

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Section: Q2mentioning

confidence: 99%

Influence of infrastructure material composition and microtopography on marine biofilm growth and photobiology

et al. 2021

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“…The high mobility of stream invertebrates contrasts strongly with the immobility of benthic biofilms in streams. Biofilms are an accumulation of sessile organisms that primarily regrow rather than recolonize following a disturbance (Leite et al 2012), which could lead to longer‐term effects of biofilm scour. For example, human trampling through invertebrate and algal communities in marine intertidal areas has been shown to cause shifts in community composition lasting for years after the trampling event (Brosnan and Crumrine 1994).…”

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confidence: 99%

Do Electrofishing Activities Disrupt Stream Biofilm Standing Stocks? An Assessment from Two Headwater Streams in Western Oregon

Heaston

Segura

Warren

2021

N American J Fish Manag

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Humans affect ecosystems in many ways, and scientific field studies are no exception. If data collection disrupts environments or biota too much, it can lead to inaccurate conclusions in the study of interest or in subsequent studies. We evaluated whether stream electrofishing surveys could measurably disturb the benthic biofilms in two forested headwaters in western Oregon, USA. While the consequences of electrofishing to macroinvertebrates and fish have been assessed, to date no studies have quantified its influence on benthic biofilms. We observed declines in the standing stocks of accrued benthic chlorophyll a directly after electrofishing in both streams. After electrofishing, the standing biofilm stocks declined by an average of~15% in Oak Creek, a small third-order stream in the Oregon Coast Range Mountains, and by an average of~34% in a third-order section of Lookout Creek, which is located in the western Cascade Mountains of Oregon, USA. In returning to Oak Creek 2 weeks after electrofishing, the standing stocks had fully recovered to their prefishing levels. While the benthic biofilm standing stocks did decline in association with electrofishing, the effects were small when compared with those of disturbances from common flow events and when scaling to the whole stream system. In Oak Creek, the proportional biofilm standing stock decline from electrofishing activity was about 26% of what was observed following a moderate flow event (40% of bank-full discharge), and about 15% of the decline in biofilm standing stocks following a complete bank-full discharge event (140% of bank-full discharge).

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“…Similarly, shading by artificial infrastructure can influence biodiversity and ecosystem functioning on rocky shores (Pardal-Souza and others, 2017). Trampling has been shown to negatively affect biodiversity on sandy, muddy and rocky shores(Leite and others, 2012;Schlacher and Thompson, 2012;Kim and others, 2018), in addition to other factors, such as littering, noise and extraction (EMBLAS, 2019). Plastic and chemical pollution has become a global threat to the marine environment, especially to sandy shores, where plastic input has increased as a result of transport during oceanographic and meteorological events(Krelling and Turra, 2019) and direct contamination by locals and tourists (EMBLAS, 2019).…”

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confidence: 99%

The Second World Ocean Assessment

2021

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The past year has presented unprecedented challenges. The coronavirus disease (COVID-19) pandemic has disrupted lives and livelihoods and exposed our societies' fragility. Sadly, the pandemic is not the only crisis that humanity faces. Climate change and biodiversity loss continue unabated, threatening sustainable development and our viability as a species. These challenges are particularly evident when we look at the state of our planet's life support system, the ocean.In 2015, the first World Ocean Assessment warned that many areas of the ocean had been seriously degraded, the greatest threat to the ocean being the failure to deal with the many pressures caused by human activities. The message in the second World Ocean Assessment is that the situation has not improved, with the many benefits that the ocean provides at risk. The Assessment advises that, to ensure sustainability, we must work together to improve integrated ocean management, including through joint research, capacity development and the sharing of data, information and technology.The ocean plays a crucial role in the achievement of the Sustainable Development Goals and the livelihoods of billions of people. We urgently need to change how we interact with it. The forthcoming United Nations Decade of Ocean Science for Sustainable Development and the United Nations Decade on Ecosystem Restoration provide opportunities for us to understand more and to reverse the damage that has already been done. The information in the second Assessment can assist in this process, as well as inform relevant intergovernmental conferences scheduled for 2021.I urge leaders and all stakeholders to heed the warnings in the Assessment as we work to conserve and sustainably manage our planet's marine environment. Let us foster not only a green but also a blue recovery from the COVID-19 pandemic.

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Abundance of biofilm on intertidal rocky shores: Can trampling by humans be a negative influence?

Cited by 9 publications

References 55 publications

Influence of infrastructure material composition and microtopography on marine biofilm growth and photobiology

Influence of infrastructure material composition and microtopography on marine biofilm growth and photobiology

Do Electrofishing Activities Disrupt Stream Biofilm Standing Stocks? An Assessment from Two Headwater Streams in Western Oregon

The Second World Ocean Assessment

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