Faeces of marine birds and mammals as substrates for microbial plankton communities

González, Pablo Alba; Álvarez-Salgado, X. Antón; Cobelo-Garcı́a, Antonio; Kaal, Joeri; Teira, Eva

doi:10.1016/j.marenvres.2022.105560

Cited by 5 publications

(8 citation statements)

References 66 publications

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“…The guano collected in the area and used in our experiments was mainly composed of ammonium, phosphate, DOC, and DON (Figure 1). This result is consistent with other studies carried out in this area concluding that L. michahellis guano is mostly composed of ammonium, uric acid, proteins, and phosphate (Alba‐González et al, 2022; Otero et al, 2015; Rial et al, 2016). Uric acid (Wright, 1995) can be mineralized into ammonium (Wainright et al, 1998); therefore, inputs of guano can further increase the availability of ammonium in the receiving seawater.…”

Section: Discussionsupporting

confidence: 92%

“…These results suggest a nutritional limitation of the bacterial and autotrophic community that was alleviated by the entry of inorganic nutrients and organic substances in the guano. Previous studies on the impact of guano enrichment showed a positive effect on phytoplankton growth in different marine ecosystems (Lorrain et al, 2017; Shatova et al, 2016), including a recent one in the Ría de Vigo (Alba‐González et al, 2022). Additionally, preceding studies carried out in the study area have concluded that under low nutrient ambient conditions, nutrient additions (controlled or natural) have the capacity to stimulate bacterial and phytoplankton growth (Martínez‐García et al, 2010; Prieto et al, 2015; Teira et al, 2016; Teixeira et al, 2018).…”

Section: Discussionmentioning

confidence: 93%

“…Uric acid (Wright, 1995) can be mineralized into ammonium (Wainright et al, 1998); therefore, inputs of guano can further increase the availability of ammonium in the receiving seawater. In addition, seabird guano can have a high concentration of essential micronutrients (Fe, Mn, Zn, and Co) and other metals (Cu, Cd, Zn, and Pb) (Alba‐González et al, 2022; Otero et al, 2018; Rial et al, 2016). Some of these nutrients and micronutrients can eventually stimulate the growth and activity of microplanktonic communities (Bristow et al, 2017; Teira et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

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Inputs of seabird guano alter microbial growth, community composition and the phytoplankton–bacterial interactions in a coastal system

Justel-Díez

Delgadillo-Nuño

Gutiérrez-Barral

et al. 2023

Environmental Microbiology

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Seabird guano enters coastal waters providing bioavailable substrates for microbial plankton, but their role in marine ecosystem functioning remains poorly understood. Two concentrations of the water soluble fraction (WSF) of gull guano were added to different natural microbial communities collected in surface waters from the Ría de Vigo (NW Spain) in spring, summer, and winter. Samples were incubated with or without antibiotics (to block bacterial activity) to test whether gull guano stimulated phytoplankton and bacterial growth, caused changes in taxonomic composition, and altered phytoplankton-bacteria interactions. Alteromonadales, Sphingobacteriales, Verrucomicrobia and diatoms were generally stimulated by guano. Chlorophyll a (Chl a) concentration and bacterial abundance significantly increased after additions independently of the initial ambient nutrient concentrations. Our study demonstrates, for the first time, that the addition of guano altered the phytoplankton-bacteria interaction index from neutral (i.e. phytoplankton growth was not affected by bacterial activity) to positive (i.e. phytoplankton growth was stimulated by bacterial activity) in the lownutrient environment occurring in spring. In contrast, when environmental nutrient concentrations were high, the interaction index changed from positive to neutral after guano additions, suggesting the presence of some secondary metabolite in the guano that is needed for phytoplankton growth, which would otherwise be supplied by bacteria.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 93%

Section: Discussionmentioning

confidence: 99%

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Inputs of seabird guano alter microbial growth, community composition and the phytoplankton–bacterial interactions in a coastal system

Justel-Díez

Delgadillo-Nuño

Gutiérrez-Barral

et al. 2023

Environmental Microbiology

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“…From the study by Fu et al [71], the δ 13 C values of methanotrophic symbiotic microorganisms in mussels ranged from −39.6 to −45.4‰. On the other side, the depleted δ 13 C values are considered definite for recent and ancient methane vent activities [21,72] and possibly from methane seeps and mud volcanoes. Lipid biomarkers give the evidence that archaea can be involved in reducing methane and possibly proficient in consuming methane as a sole carbon source in anaerobic conditions.…”

Section: Characteristic Preference Index Of Lipid Biomarkersmentioning

confidence: 99%

“…The organic matter preserved in marine sediments keeps extensive evidence concerning historic environment records, such as past productivity, paleoclimate change, paleo-environmental conditions, genetic information, and knowledge about microbes and food sources [21][22][23]. Lipid biomarkers and 13 C stable isotope are two widely used methods to track organic matter in marine sediments.…”

Section: Introductionmentioning

confidence: 99%

The Characteristics of Lipid Biomarkers from the Abyssal and Hadal Sediments of the Yap Trench and the Influence of V-Shape Topography

Khuhawar

Sun

Yang

et al. 2022

Water

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Lipid biomarkers from deep-sea sediments have been observed in several studies, but little is known about their occurrence in trench system sediments. Here, we determined the concentrations of lipid biomarkers (fatty acids and neutral lipids) in sediments from the north Yap Trench. Our results showed that short-chain (C12–20) saturated fatty acids (SFAs) contributed more than (C12:1–23:1) monounsaturated fatty acids (MUFAs), and (C16:3–24:4) polyunsaturated fatty acids (PUFAs). Most fatty acids (FAs) suggest that bacteria and algae were the main contributors to marine organic matter. In contrast, terrestrial organic matter (OM) was a minor contributor to long carbon chain fatty acids greater than C20. On the other side, the observed neutral lipids such as alkanes (C14–C27), alkanols (C12–C20), alkenes (C17:1–C26:1), phytol and sterol (C27–29) indicate that phytoplankton and bacteria were the main contributors of organic materials in the sediments, and the carbon chain of neutral lipids C20–29 offering the sources of terrestrial organic matter. The extremely depleted δ13C values of fatty acids give the sources of organic carbon in the sediments from bacteria, algae, and methane-related microbes. This study is important for understanding the biogeochemical activities in deep-sea environments, particularly in the abyss and hadal zones. It will be helpful to understand the sources, transfer, and deposition of organic matter in marine trenches.

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Trace Metals in Phytoplankton: Requirements, Function, and Composition in Harmful Algal Blooms

Manic,

Redil,

Rodriguez

2024

Preprint

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In a constantly changing environment brought about by the climate crisis and escalated anthropogenic perturbations driven by the growing population, harmful algal bloom dynamics and their impacts are expected to shift, necessitating adaptive management strategies and comprehensive research efforts. Similar to primary productivity, HABs have been thought to be driven primarily by major nutrients such as N, P, and Si. However, recent investigations on the role and importance of micronutrients as limiting factors in aquatic environments have been highlighted. This paper provides a review of metal and phytoplankton interactions, with a specific emphasis on pertinent information on the influence of trace nutrients on growth, toxin production, and other underlying mechanisms related to the dynamics of HABs. Low to near-depleted levels of essential nutrients including Fe, Cu, Zn, Se, Mn, Co, and Mo, negatively impact cell growth and proliferation of various marine and freshwater HAB species. However, evidence shows that at elevated levels, these trace elements along with other non-essential ones, could still cause toxic effects to certain HAB species manifested by decreased photosynthetic activities, oxidative stress, ultrastructure damage, and cyst formation. Interestingly, while elevated levels of these metals mostly result in increased toxin production, Co (i.e., yessotoxins, gymnodimine, and palytoxins) and Mn (i.e., isodomoic acid, okadaic and diol esters) enrichments revealed otherwise. In addition to toxin production, releasing dissolved organic matter (DOM) including dissolved organic carbon (DOC) and humic substances was observed as an adaptation strategy, since these organic compounds have been proven to chelate metals in the water column, thereby reducing metal-induced toxicity. Whilst current research center on free metal toxicity of specific essential elements such as in Cu and Zn, a comprehensive account of how trace metals contribute to the growth, toxin production, and other metabolic processes under conditions reflective of in-situ scenarios of HAB-prone areas, would yield new perspectives on the roles of trace metals in HABs. With the growing demands of the global population for food security and sustainability, substantial pressure is exerted on the agriculture and aquaculture sector, highlighting the need for effective communication of information regarding the interactions of macro- and micronutrients with HABs to improve existing policies and practices.

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Faeces of marine birds and mammals as substrates for microbial plankton communities

Cited by 5 publications

References 66 publications

Inputs of seabird guano alter microbial growth, community composition and the phytoplankton–bacterial interactions in a coastal system

Inputs of seabird guano alter microbial growth, community composition and the phytoplankton–bacterial interactions in a coastal system

The Characteristics of Lipid Biomarkers from the Abyssal and Hadal Sediments of the Yap Trench and the Influence of V-Shape Topography

Trace Metals in Phytoplankton: Requirements, Function, and Composition in Harmful Algal Blooms

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