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Pigment signatures of algal communities and their implications for glacier surface darkening. Sci Rep 2022; 12:17643. [PMID: 36271236 PMCID: PMC9587043 DOI: 10.1038/s41598-022-22271-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 10/12/2022] [Indexed: 01/18/2023] Open
Abstract
Blooms of pigmented algae darken the surface of glaciers and ice sheets, thereby enhancing solar energy absorption and amplifying ice and snow melt. The impacts of algal pigment and community composition on surface darkening are still poorly understood. Here, we characterise glacier ice and snow algal pigment signatures on snow and bare ice surfaces and study their role in photophysiology and energy absorption on three glaciers in Southeast Greenland. Purpurogallin and astaxanthin esters dominated the glacier ice and snow algal pigment pools (mass ratios to chlorophyll a of 32 and 56, respectively). Algal biomass and pigments impacted chromophoric dissolved organic matter concentrations. Despite the effective absorption of astaxanthin esters at wavelengths where incoming irradiance peaks, the cellular energy absorption of snow algae was 95% lower than anticipated from their pigmentation, due to pigment packaging. The energy absorption of glacier ice algae was consequently ~ 5 × higher. On bare ice, snow algae may have locally contributed up to 13% to total biological radiative forcing, despite contributing 44% to total biomass. Our results give new insights into the impact of algal community composition on bare ice energy absorption and biomass accumulation during snow melt.
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2
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Song X, Zhao Y, Zhang L, Xie X, Wu J, Wei Z, Yang H, Zhang S, Song C, Jia L. Photodegradation, bacterial metabolism, and photosynthesis drive the dissolved organic matter cycle in the Heilongjiang River. CHEMOSPHERE 2022; 295:133923. [PMID: 35143859 DOI: 10.1016/j.chemosphere.2022.133923] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 10/23/2021] [Accepted: 02/06/2022] [Indexed: 06/14/2023]
Abstract
Dissolved organic matter (DOM) plays a vital role in the biogeochemistry of aquatic ecosystems. However, the mechanisms of DOM cycling in the water column during different seasons have not been fully elucidated to date. The differences in DOM degradation in summer, autumn, and winter water columns were evaluated in this study. The results showed that bacteria played an essential role in the degradation of DOM in the summer water column. Photochemical degradation was the primary degradation pathway of DOM in the autumn and winter water columns. Notably, while DOM is degraded, photosynthetic bacteria produce organic matter through photosynthesis to replenish the water column. EEM-PARAFAC analysis indicated more tryptophan component C1 in summer, but the contents of humic substance component C2 and terrestrial substance C3 were higher in autumn and winter. In summer, more tryptophan-like components were consumed by bacteria, and Cyanobacteria produced more organic matter through photosynthesis to replenish the water column. Moreover, a similar bacterial community structure and a more active tryptophan biosynthesis pathway were found in autumn and winter. Random forest models identified representative bacteria involved in the DOM transformation process in different seasons. The above findings may be helpful to explore the degradation characteristics of DOM in different seasons and predict the fate of DOM in the water column in the future.
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Affiliation(s)
- Xinyu Song
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Yue Zhao
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Linyuan Zhang
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Xinyu Xie
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Junqiu Wu
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Zimin Wei
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China.
| | - Hongyu Yang
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Shubo Zhang
- College of Life Science, Northeast Agricultural University, Harbin, 150030, China
| | - Caihong Song
- College of Life Science, Liaocheng University, Liaocheng, 252000, China
| | - Liming Jia
- Environmental Monitoring Center of Heilongjiang Province, Harbin, 150056, China
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3
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Resilience and self-regulation processes of microalgae under UV radiation stress. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY C: PHOTOCHEMISTRY REVIEWS 2020. [DOI: 10.1016/j.jphotochemrev.2019.100322] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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4
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Matthes LC, Mundy CJ, L.-Girard S, Babin M, Verin G, Ehn JK. Spatial Heterogeneity as a Key Variable Influencing Spring-Summer Progression in UVR and PAR Transmission Through Arctic Sea Ice. FRONTIERS IN MARINE SCIENCE 2020; 7. [PMID: 0 DOI: 10.3389/fmars.2020.00183] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
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D'Agostino PM, Woodhouse JN, Liew HT, Sehnal L, Pickford R, Wong HL, Burns BP, Neilan BA. Bioinformatic, phylogenetic and chemical analysis of the UV‐absorbing compounds scytonemin and mycosporine‐like amino acids from the microbial mat communities of Shark Bay, Australia. Environ Microbiol 2019; 21:702-715. [DOI: 10.1111/1462-2920.14517] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Revised: 12/20/2018] [Accepted: 12/24/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Paul M. D'Agostino
- School of Biotechnology and Biomolecular Sciences University of New South Wales Sydney New South Wales Australia
- Biosystems Chemistry, Department of Chemistry and Center for Integrated Protein Science Munich (CIPSM) Technische Universität München Garching Germany
| | - Jason N. Woodhouse
- School of Biotechnology and Biomolecular Sciences University of New South Wales Sydney New South Wales Australia
- Department of Experimental Limnology Leibniz‐Institute of Freshwater Ecology and Inland Fisheries Stechlin Germany
| | - Heng Tai Liew
- School of Biotechnology and Biomolecular Sciences University of New South Wales Sydney New South Wales Australia
- School of Biological Sciences Nanyang Technological University 60 Nanyang Drive Singapore
| | - Luděk Sehnal
- Research Centre for Toxic Compounds in the Environment, Faculty of Science Masaryk University Kamenice 5, 625 00, Brno Czech Republic
| | - Russel Pickford
- Bioanalytical Mass Spectrometry Facility, Mark Wainwright Analytical Centre University of New South Wales Sydney New South Wales Australia
| | - Hon Lun Wong
- School of Biotechnology and Biomolecular Sciences University of New South Wales Sydney New South Wales Australia
| | - Brendan P. Burns
- School of Biotechnology and Biomolecular Sciences University of New South Wales Sydney New South Wales Australia
| | - Brett A. Neilan
- School of Biotechnology and Biomolecular Sciences University of New South Wales Sydney New South Wales Australia
- School of Environmental and Life Sciences University of Newcastle Newcastle New South Wales Australia
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6
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Synthesis of mycosporine-like amino acids by a size-fractionated marine phytoplankton community of the arctic beaufort sea. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2018; 188:87-94. [PMID: 30237008 DOI: 10.1016/j.jphotobiol.2018.09.008] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 08/15/2018] [Accepted: 09/10/2018] [Indexed: 11/21/2022]
Abstract
During the RV-ARAON cruise, a comparative study on the biosynthesis of mycosporine-like amino acids (MAAs) was conducted for the size-fractionated phytoplankton of the Beaufort Sea (Arctic). The MAAs contents in the micro-phytoplankton community (>20 μm size) is considerably higher than that observed in the nano- (20-2 μm size) and pico-phytoplankton (<2 μm size) communities. The micro-phytoplankton of the Mackenzie Shelf had a relatively higher Chlorophyll a (Chl a) concentration. Considering the total phytoplankton community, the MAAs concentration as well as net production of individual MAAs (such as shinorine and palythine) were higher at the Mackenzie Shelf rather than at the sites located beyond the Beaufort Sea; precisely, the highest net production rates of shinorine and palythine were 0.211 (±0.02) ng C L-1 d-1 and 0.136 (±0.001) ng C L-1 d-1 respectively (No other MAAs were detected). The micro-phytoplankton used around 0.5% of the total carbon uptake for the synthesis of MAAs. Compared to the smaller phytoplankton community, the micro-phytoplankton utilized more of their energy for the biosynthesis of MAAs; on the other hand, nano- and pico-phytoplankton focused on cellular activity and had poor biosynthesis of MAAs. This clearly indicates the phytoplankton size-dependent variation in the biosynthesis of MAA in the natural phytoplankton community. This study revealed the environmental adaptation of the various sizes of phytoplankton community as well as their physiological response in the Arctic Beaufort Sea.
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Villafañe VE, Paczkowska J, Andersson A, Durán Romero C, Valiñas MS, Helbling EW. Dual role of DOM in a scenario of global change on photosynthesis and structure of coastal phytoplankton from the South Atlantic Ocean. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 634:1352-1361. [PMID: 29710635 DOI: 10.1016/j.scitotenv.2018.04.121] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 04/08/2018] [Accepted: 04/09/2018] [Indexed: 06/08/2023]
Abstract
We evaluated the dual role of DOM (i.e., as a source of inorganic nutrients and as an absorber of solar radiation) on a phytoplankton community of the western South Atlantic Ocean. Using a combination of microcosms and a cluster approach, we simulated the future conditions of some variables that are highly influenced by global change in the region. We increased nutrients (i.e., anthropogenic input) and dissolved organic matter (DOM), and we decreased the pH, to assess their combined impact on growth rates (μ), species composition/abundance and size structure, and photosynthesis (considering in this later also the effects of light quality i.e., with and without ultraviolet radiation). We simulated two Future conditions (Fut) where nutrients and pH were similarly manipulated, but in one the physical role of DOM (Futout) was assessed whereas in the other (Futin) the physico-chemical role was evaluated; these conditions were compared with a control (Present condition, Pres). The μ significantly increased in both Fut conditions as compared to the Pres, probably due to the nutrient addition and acidification in the former. The highest μ were observed in the Futout, due to the growth of nanoplanktonic flagellates and diatoms. Cells in the Futin were photosynthetically less efficient as compared to those of the Futout and Pres, but these physiological differences, also between samples with or without solar UVR observed at the beginning of the experiment, decreased with time hinting for an acclimation process. The knowledge of the relative importance of both roles of DOM is especially important for coastal areas that are expected to receive higher inputs and will be more acidified in the future.
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Affiliation(s)
- Virginia E Villafañe
- Estación de Fotobiología Playa Unión, Casilla de Correos N°15, 9103 Rawson, Chubut, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - Joanna Paczkowska
- Department of Ecology and Environmental Science, Umeå University, 901 87 Umeå, Sweden
| | - Agneta Andersson
- Department of Ecology and Environmental Science, Umeå University, 901 87 Umeå, Sweden.
| | - Cristina Durán Romero
- Estación de Fotobiología Playa Unión, Casilla de Correos N°15, 9103 Rawson, Chubut, Argentina
| | - Macarena S Valiñas
- Estación de Fotobiología Playa Unión, Casilla de Correos N°15, 9103 Rawson, Chubut, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
| | - E Walter Helbling
- Estación de Fotobiología Playa Unión, Casilla de Correos N°15, 9103 Rawson, Chubut, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
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Carena L, Minella M, Barsotti F, Brigante M, Milan M, Ferrero A, Berto S, Minero C, Vione D. Phototransformation of the Herbicide Propanil in Paddy Field Water. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2017; 51:2695-2704. [PMID: 28145687 DOI: 10.1021/acs.est.6b05053] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
When irradiated in paddy-field water, propanil (PRP) undergoes photodegradation by direct photolysis, by reactions with •OH and CO3•-, and possibly also with the triplet states of chromophoric dissolved organic matter. Irradiation also inhibits the nonphotochemical (probably biological) degradation of PRP. The dark- and light-induced pathways can be easily distinguished because 3,4-dichloroaniline (34DCA, a transformation intermediate of considerable environmental concern) is produced with almost 100% yield in the dark but not at all through photochemical pathways. This issue allows an easy assessment of the dark process(es) under irradiation. In the natural environment, we expect PRP photodegradation to be important only in the presence of elevated nitrate and/or nitrite levels, e.g., [NO3-] approaching 1 mmol L-1 (corresponding to approximately 60 mg L-1). Under these circumstances, •OH and CO3•- would play a major role in PRP phototransformation. Because flooded paddy fields are efficient denitrification bioreactors that can achieve decontamination of nitrate-rich water used for irrigation, irrigation with such water would both enhance PRP photodegradation and divert PRP dissipation processes away from the production of 34DCA, at least in the daylight hours.
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Affiliation(s)
- Luca Carena
- Dipartimento di Chimica, Università di Torino , Via Pietro Giuria 5, 10125 Torino, Italy
| | - Marco Minella
- Dipartimento di Chimica, Università di Torino , Via Pietro Giuria 5, 10125 Torino, Italy
| | - Francesco Barsotti
- Dipartimento di Chimica, Università di Torino , Via Pietro Giuria 5, 10125 Torino, Italy
| | - Marcello Brigante
- Clermont Université, Université Blaise Pascal, Institut de Chimie de Clermont-Ferrand, & CNRS, UMR 6296, ICCF, BP 80026 , F-63177 Aubière, France
| | - Marco Milan
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università di Torino , Largo Paolo Braccini 2, 10095 Grugliasco (TO), ITALY
| | - Aldo Ferrero
- Dipartimento di Scienze Agrarie, Forestali e Alimentari, Università di Torino , Largo Paolo Braccini 2, 10095 Grugliasco (TO), ITALY
| | - Silvia Berto
- Dipartimento di Chimica, Università di Torino , Via Pietro Giuria 5, 10125 Torino, Italy
| | - Claudio Minero
- Dipartimento di Chimica, Università di Torino , Via Pietro Giuria 5, 10125 Torino, Italy
| | - Davide Vione
- Dipartimento di Chimica, Università di Torino , Via Pietro Giuria 5, 10125 Torino, Italy
- Università di Torino , Centro Interdipartimentale NatRisk, Largo Paolo Braccini 2, 10095 Grugliasco (TO), Italy
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9
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Enberg S, Piiparinen J, Majaneva M, Vähätalo AV, Autio R, Rintala JM. Solar PAR and UVR modify the community composition and photosynthetic activity of sea ice algae. FEMS Microbiol Ecol 2015. [PMID: 26310455 DOI: 10.1093/femsec/fiv102 fiv102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The effects of increased photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) on species diversity, biomass and photosynthetic activity were studied in fast ice algal communities. The experimental set-up consisted of nine 1.44 m(2) squares with three treatments: untreated with natural snow cover (UNT), snow-free (PAR + UVR) and snow-free ice covered with a UV screen (PAR). The total algal biomass, dominated by diatoms and dinoflagellates, increased in all treatments during the experiment. However, the smaller biomass growth in the top 10-cm layer of the PAR + UVR treatment compared with the PAR treatment indicated the negative effect of UVR. Scrippsiella complex (mainly Scrippsiella hangoei, Biecheleria baltica and Gymnodinium corollarium) showed UV sensitivity in the top 5-cm layer, whereas Heterocapsa arctica ssp. frigida and green algae showed sensitivity to both PAR and UVR. The photosynthetic activity was highest in the top 5-cm layer of the PAR treatment, where the biomass of the pennate diatom Nitzschia frigida increased, indicating the UV sensitivity of this species. This study shows that UVR is one of the controlling factors of algal communities in Baltic Sea ice, and that increased availability of PAR together with UVR exclusion can cause changes in algal biomass, photosynthetic activity and community composition.
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Affiliation(s)
- Sara Enberg
- Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, FI-10900 Hanko, Finland Department of Environmental Sciences, University of Helsinki, PO Box 65, FI-00014 Helsinki, Finland
| | - Jonna Piiparinen
- Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, FI-10900 Hanko, Finland Finnish Environment Institute, Marine Research Centre, PO Box 140, FI-00251 Helsinki, Finland
| | - Markus Majaneva
- Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, FI-10900 Hanko, Finland Department of Environmental Sciences, University of Helsinki, PO Box 65, FI-00014 Helsinki, Finland
| | - Anssi V Vähätalo
- Department of Biological and Environmental Science, PO Box 35, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Riitta Autio
- Finnish Environment Institute, Marine Research Centre, PO Box 140, FI-00251 Helsinki, Finland
| | - Janne-Markus Rintala
- Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, FI-10900 Hanko, Finland Department of Environmental Sciences, University of Helsinki, PO Box 65, FI-00014 Helsinki, Finland
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10
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Enberg S, Piiparinen J, Majaneva M, Vähätalo AV, Autio R, Rintala JM. Solar PAR and UVR modify the community composition and photosynthetic activity of sea ice algae. FEMS Microbiol Ecol 2015; 91:fiv102. [PMID: 26310455 DOI: 10.1093/femsec/fiv102] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/20/2015] [Indexed: 11/12/2022] Open
Abstract
The effects of increased photosynthetically active radiation (PAR) and ultraviolet radiation (UVR) on species diversity, biomass and photosynthetic activity were studied in fast ice algal communities. The experimental set-up consisted of nine 1.44 m(2) squares with three treatments: untreated with natural snow cover (UNT), snow-free (PAR + UVR) and snow-free ice covered with a UV screen (PAR). The total algal biomass, dominated by diatoms and dinoflagellates, increased in all treatments during the experiment. However, the smaller biomass growth in the top 10-cm layer of the PAR + UVR treatment compared with the PAR treatment indicated the negative effect of UVR. Scrippsiella complex (mainly Scrippsiella hangoei, Biecheleria baltica and Gymnodinium corollarium) showed UV sensitivity in the top 5-cm layer, whereas Heterocapsa arctica ssp. frigida and green algae showed sensitivity to both PAR and UVR. The photosynthetic activity was highest in the top 5-cm layer of the PAR treatment, where the biomass of the pennate diatom Nitzschia frigida increased, indicating the UV sensitivity of this species. This study shows that UVR is one of the controlling factors of algal communities in Baltic Sea ice, and that increased availability of PAR together with UVR exclusion can cause changes in algal biomass, photosynthetic activity and community composition.
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Affiliation(s)
- Sara Enberg
- Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, FI-10900 Hanko, Finland Department of Environmental Sciences, University of Helsinki, PO Box 65, FI-00014 Helsinki, Finland
| | - Jonna Piiparinen
- Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, FI-10900 Hanko, Finland Finnish Environment Institute, Marine Research Centre, PO Box 140, FI-00251 Helsinki, Finland
| | - Markus Majaneva
- Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, FI-10900 Hanko, Finland Department of Environmental Sciences, University of Helsinki, PO Box 65, FI-00014 Helsinki, Finland
| | - Anssi V Vähätalo
- Department of Biological and Environmental Science, PO Box 35, University of Jyväskylä, FI-40014 Jyväskylä, Finland
| | - Riitta Autio
- Finnish Environment Institute, Marine Research Centre, PO Box 140, FI-00251 Helsinki, Finland
| | - Janne-Markus Rintala
- Tvärminne Zoological Station, University of Helsinki, J.A. Palménin tie 260, FI-10900 Hanko, Finland Department of Environmental Sciences, University of Helsinki, PO Box 65, FI-00014 Helsinki, Finland
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Norros V, Karhu E, Nordén J, Vähätalo AV, Ovaskainen O. Spore sensitivity to sunlight and freezing can restrict dispersal in wood-decay fungi. Ecol Evol 2015; 5:3312-26. [PMID: 26380666 PMCID: PMC4569028 DOI: 10.1002/ece3.1589] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Accepted: 06/08/2015] [Indexed: 11/17/2022] Open
Abstract
Assessment of the costs and benefits of dispersal is central to understanding species' life-history strategies as well as explaining and predicting spatial population dynamics in the changing world. While mortality during active movement has received much attention, few have studied the costs of passive movement such as the airborne transport of fungal spores. Here, we examine the potential of extreme environmental conditions to cause dispersal mortality in wood-decay fungi. These fungi play a key role as decomposers and habitat creators in forest ecosystems and the populations of many species have declined due to habitat loss and fragmentation. We measured the effect of simulated solar radiation (including ultraviolet A and B) and freezing at -25°C on the spore germinability of 17 species. Both treatments but especially sunlight markedly reduced spore germinability in most species, and species with thin-walled spores were particularly light sensitive. Extrapolating the species' laboratory responses to natural irradiance conditions, we predict that sunlight is a relevant source of dispersal mortality at least at larger spatial scales. In addition, we found a positive effect of spore size on spore germinability, suggesting a trade-off between dispersal distance and establishment. We conclude that freezing and particularly sunlight can be important sources of dispersal mortality in wood-decay fungi which can make it difficult for some species to colonize isolated habitat patches and habitat edges.
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Affiliation(s)
- Veera Norros
- Department of Biosciences, Metapopulation Research Centre, University of HelsinkiP.O. Box 65, FI-00014, Helsinki, Finland
- Marine Research Centre, Finnish Environment InstituteP.O. Box 140, FI-00251, Helsinki, Finland
| | - Elina Karhu
- Department of Biosciences, Metapopulation Research Centre, University of HelsinkiP.O. Box 65, FI-00014, Helsinki, Finland
| | - Jenni Nordén
- Natural History Museum, University of OsloP.O. Box 1172 Blindern, NO-0318, Oslo, Norway
- Section for Genetics and Evolutionary Biology, Department of Biosciences, University of OsloP.O. Box 1066 Blindern, NO-0316, Oslo, Norway
| | - Anssi V Vähätalo
- Department of Environmental Sciences, University of HelsinkiP.O. Box 65, FI-00014, Helsinki, Finland
| | - Otso Ovaskainen
- Department of Biosciences, Metapopulation Research Centre, University of HelsinkiP.O. Box 65, FI-00014, Helsinki, Finland
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