Abstract
Species interactions in nature can be positive or negative. The stress gradient hypothesis (SGH) states that the strength of positive interactions increases with increasing stress. The phylogenetic limiting similarity hypothesis (PLSH) states that competition intensity is likely to be greater between closely related species than between distantly related species. Testing the SGH, the PLSH and determining the factors that influence species interactions with changing stress levels are important for ecosystem conservation and restoration. In the following study we conducted experiments to investigate the effects of salinity stress, phylogenetic relatedness (i.e., the sum of branch lengths separating species on a phylogenetic tree), and species ecological strategy on interspecific interactions using 11 species found with in a salt marsh located in the Yellow River Delta, China. We found most of the species interactions across increasing salinity levels to be inconsistent with the SGH. The net outcomes of interspecific interactions were significantly affected by multiple factors, including salinity stress, phylogenetic distance, ecological strategy, and the interaction between salinity and phylogenetic distance. Importantly, with increasing phylogenetic distance separating a pair species, the likelihood of facilitative interactions was increased and the likelihood of competitive interactions was reduced; this relationship was especially strong at medium and high salinities and supports the PLSH.
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Alexandrou MA et al (2015) Evolutionary relatedness does not predict competition and co-occurrence in natural or experimental communities of green algae. Proc R Soc B Biol Sci 282. doi:10.1098/Rspb.2014.1745 (Artn 20141745)
Armas C, Ordiales R, Pugnaire FI (2004) Measuring plant interactions: a new comparative index. Ecology 85:2682–2686. doi:10.1890/03-0650
Bertness MD (1991) Zonation of Spartina patens and Spartina alterniflora in a New-England salt-marsh. Ecology 72:138–148
Bertness MD, Callaway R (1994) Positive interactions in communities. Trends Ecol Evol 9:191–193. doi:10.1016/0169-5347(94)90088-4
Bertness MD, Hacker SD (1994) Physical stress and positive associations among marsh plants. Am Nat 144:363–372
Bertness MD, Gough L, Shumway SW (1992) Salt tolerances and the distribution of fugitive salt-marsh plants. Ecology 73:1842–1851. doi:10.2307/1940035
Bornette G, Puijalon S (2011) Response of aquatic plants to abiotic factors: a review. Aquat Sci 73:1–14. doi:10.1007/s00027-010-0162-7
Bremer B et al (2009) An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Bot J Linn Soc 161:105–121
Bruno JF, Stachowicz JJ, Bertness MD (2003) Inclusion of facilitation into ecological theory Trends Ecol Evol 18:119–125 doi:10.1016/S0169-5347(02)00045-9
Burns JH, Strauss SY (2011) More closely related species are more ecologically similar in an experimental test. Proc Natl Acad Sci USA 108:5302–5307. doi:10.1073/pnas.1013003108
Cahill JF, Kembel SW, Lamb EG, Keddy PA (2008) Does phylogenetic relatedness influence the strength of competition among vascular plants? Perspect Plant Ecol 10:41–50. doi:10.1016/j.ppees.2007.10.001
Callaway RM (1995) Positive interactions among plants. Bot Rev 61:306–349. doi:10.1007/Bf02912621
Callaway RM (1997) Positive interactions in plant communities and the individualistic-continuum concept. Oecologia 112:143–149. doi:10.1007/s004420050293
Callaway RM, Pennings SC (2000) Facilitation may buffer competitive effects: indirect and diffuse interactions among salt marsh plants. Am Nat 156:416–424. doi:10.1086/303398
Castillo JP, Verdu M, Valiente-Banuet A (2010) Neighborhood phylodiversity affects plant performance. Ecology 91:3656–3663. doi:10.1890/10-0720.1
Crain CM, Silliman BR, Bertness SL, Bertness MD (2004) Physical and biotic drivers of plant distribution across estuarine salinity gradients. Ecology 85:2539–2549. doi:10.1890/03-0745
Fritschie KJ, Cardinale BJ, Alexandrou MA, Oakley TH (2014) Evolutionary history and the strength of species interactions: testing the phylogenetic limiting similarity hypothesis. Ecology 95:1407–1417. doi:10.1890/13-0986.1
Grime JP (1977) Evidence for existence of three primary strategies in plants and its relevance to ecological and evolutionary theory. Am Nat 111:1169–1194. doi:10.1086/283244
Hacker SD, Bertness MD (1999) Experimental evidence for factors maintaining plant species diversity in a New England salt marsh. Ecology 80:2064–2073
He Q, Cui BS, Bertness MD, An Y (2012) Testing the importance of plant strategies on facilitation using congeners in a coastal community. Ecology 93:2023–2029
He Q, Bertness MD, Altieri AH (2013) Global shifts towards positive species interactions with increasing environmental stress. Ecol Lett 16:695–706. doi:10.1111/Ele.12080
Hedges SB, Dudley J, Kumar S (2006) TimeTree: a public knowledge-base of divergence times among organisms. Bioinformatics 22:2971–2972. doi:10.1093/bioinformatics/btl505
Liancourt P, Callaway RM, Michalet R (2005) Stress tolerance and competitive-response ability determine the outcome of biotic interactions. Ecology 86:1611–1618. doi:10.1890/04-1398
Lortie CJ, Callaway RM (2006) Re-analysis of meta-analysis: support for the stress-gradient hypothesis. J Ecol 94:7–16. doi:10.1111/j.1365-2745.2005.01066.x
Maestre FT, Callaway RM, Valladares F, Lortie CJ (2009) Refining the stress-gradient hypothesis for competition and facilitation in plant communities. J Ecol 97:199–205. doi:10.1111/j.1365-2745.2008.01476.x
Narwani A, Alexandrou MA, Oakley TH, Carroll IT, Cardinale BJ (2013) Experimental evidence that evolutionary relatedness does not affect the ecological mechanisms of coexistence in freshwater green algae. Ecol Lett 16:1373–1381. doi:10.1111/ele.12182
Pennings SC, Grant MB, Bertness MD (2005) Plant zonation in low-latitude salt marshes: disentangling the roles of flooding, salinity and competition. J Ecol 93:159–167 doi. DOI:10.1111/j.1365-2745.2004.00959.x
Reich PB, Wright IJ, Cavender-Bares J, Craine JM, Oleksyn J, Westoby M, Walters MB (2003) The evolution of plant functional variation: traits, spectra, and strategies. Int J Plant Sci 164:S143–S164. doi:10.1086/374368
Silliman BR et al (2015) Facilitation shifts paradigms and can amplify coastal restoration efforts. Proc Natl Acad Sci USA 112:14295–14300
Soliveres S, Torices R, Maestre FT (2012) Evolutionary relationships can be more important than abiotic conditions in predicting the outcome of plant–plant interactions. Oikos 121:1638–1648. doi:10.1111/j.1600-0706.2011.20309.x
Venail PA, Narwani A, Fritschie K, Alexandrou MA, Oakley TH, Cardinale BJ (2014) The influence of phylogenetic relatedness on species interactions among freshwater green algae in a mesocosm experiment. J Ecol 102:1288–1299. doi:10.1111/1365-2745.12271
Verdu M, Rey PJ, Alcantara JM, Siles G, Valiente-Banuet A (2009) Phylogenetic signatures of facilitation and competition in successional communities. J Ecol 97:1171–1180. doi:10.1111/j.1365-2745.2009.01565.x
Verdu M, Gomez-Aparicio L, Valiente-Banuet A (2012) Phylogenetic relatedness as a tool in restoration ecology: a meta-analysis. Proc R Soc B Biol Sci 279:1761–1767. doi:10.1098/rspb.2011.2268
Violle C, Nemergut DR, Pu ZC, Jiang L (2011) Phylogenetic limiting similarity and competitive exclusion. Ecol Lett 14:782–787. doi:10.1111/j.1461-0248.2011.01644.x
Webb CO, Donoghue MJ (2005) Phylomatic: tree assembly for applied phylogenetics. Mol Ecol Notes 5:181–183. doi:10.1111/j.1471-8286.2004.00829.x
Webb CO, Ackerly DD, Kembel SW (2008) Phylocom: software for the analysis of phylogenetic community structure and trait evolution. Bioinformatics 24:2098–2100. doi:10.1093/bioinformatics/btn358
Wikstrom N, Savolainen V, Chase MW (2001) Evolution of the angiosperms: calibrating the family tree. Proc R Soc B Biol Sci 268:2211–2220. doi:10.1098/rspb.2001.1782
Zhang LW, Shao HB (2013) Direct plant–plant facilitation in coastal wetlands: a review. Estuar Coast Shelf Sci 119:1–6 doi:10.1016/j.ecss.2013.01.002
Zhang LW, Wang BC (2016) Intraspecific interactions shift from competitive to facilitative across a low to high disturbance gradient in a salt marsh. Plant Ecol 217:959–967. doi:10.1007/s11258-016-0621-x
Zhang L, Mi X, Shao H (2016) Phylogenetic relatedness influences plant interspecific interactions across stress levels in coastal ecosystems: a meta-analysis. Estuar Coasts 1–10 doi:10.1007/s12237-016-0104-2
Acknowledgements
This research was funded by National Natural Science Foundation of China (No. 31100313). We thank the reviewers and editor for their comments and suggestions, which have been very helpful for improving the manuscript. We would also like to thank Christine Verhille at the University of British Columbia for her assistance with English language and grammatical editing of the manuscript.
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Zhang, L., Wang, B. & Qi, L. Phylogenetic relatedness, ecological strategy, and stress determine interspecific interactions within a salt marsh community. Aquat Sci 79, 587–595 (2017). https://doi.org/10.1007/s00027-017-0519-2
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DOI: https://doi.org/10.1007/s00027-017-0519-2