0000034743 00000 n Moreover, because competitive outcomes may depend on various environmental conditions (Erland and Finlay 1992; Mahmood 2003), unless one can accurately predict future environmental conditions or declare competition to be utterly unimportant in structuring communities (Grime 2006), it seems unlikely that community structure can be predicted from a database of species traits. /Info 66 0 R /Size 111 New roots can be produced in two ways. (2000) studied communities of ectomycorrhizal fungi associated with Norway spruce (Picea abies) along an N deposition gradient from Scandinavia (relatively pollution free) to central Europe. Ann For Sci 67(110):11, Rosling A, Landeweert R, Lindahl BD, Larsson K-H, Kuyper TW, Taylor AFS, Finlay RD (2003) Vertical distribution of ectomycorrhizal fungal taxa in a podzol soil profile. Community ecology is often perceived as a mess, given the seemingly vast number of processes that can underlie the many patterns of interest, and the apparent uniqueness of each study system. ��F��L�|�l՛��fõ$y��ڭ������,�;�+2s�����#"�'T���v�Ϊ҄��i�۲j�iT-�lAղ|Ѭ՛���. If competition for any of those resources were important in the assembly of communities, then we probably ought to consider the community to comprise species that could potentially interact in the soil, irrespective of host species. New Phytol 186:755–768, Pillar VD, Duarte LdS, Sosinski EE, Joner F (2009) Discriminating trait-convergence and trait-divergence assembly patterns in ecological community gradients. 0000001770 00000 n In a sufficiently homogeneous habitat, interspecific competition may lead to a reduction in evenness (Lamb et al. Plant Soil 244:19–28, Taylor AFS, Martin F, Read DJ (2000) Fungal diversity in ectomycorrhizal communities of Norway spruce [Picea abies (L.) Karst.] Do community-weighted mean functional traits reflect optimal strategies? Oecologia 76:273–277, Cavender-Bares J, Izzo A, Robinson R, Lovelock CE (2009) Changes in ectomycorrhizal community structure on two containerized oak hosts across an experimental hydrologic gradient. 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It stands to reason that the structure of a community is altered by such factors and practices because the component species respond in different ways to them. Those from high N sites did not. Ectomycorrhizal fungal isolates also differ from one another in preference for substrate pH (Hung and Trappe 1983; Sundari and Adholeya 2003), temperature (Hacskaylo et al. 1998), a large degree of variation exists among individual trees in the structure of the ectomycorrhizal fungal community. The response to disturbance depends on variation in functional traits. >> CAS /N 13 For example, species of ectomycorrhizal fungi are known to differ from each other substantially in drought tolerance (Mexal and Reid 1973; Coleman et al. 2008). Knowledge of the factors that determine ectomycorrhizal fungal community structure is essential in many areas of practical significance including conservation, habitat restoration, prevention or amelioration of species invasions, and the prediction of responses to climate change. The nature of disturbance may determine the traits that determine the outcome of competition. Roger T. Koide. 0000001259 00000 n stand of the Bavarian Limestone Alps. in the southern Chihuahuan Desert, Community assembly of ectomycorrhizal fungi along a subtropical secondary forest succession, Nonrandom, diversifying processes are disproportionately strong in the smallest size classes of a tropical forest, Metacommunity versus Biogeography: A Case Study of Two Groups of Neotropical Vegetation-Dwelling Arthropods, https://doi.org/10.1371/journal.pone.0115137, Contrasting assembly processes in a bacterial metacommunity along a desiccation gradient, On the processes generating latitudinal richness gradients: identifying diagnostic patterns and predictions, Ecological theory as a foundation to control pathogenic invasion in aquaculture, Assessing the relative importance of neutral stochasticity in ecological communities. As we apply what has been learned about other organisms concerning the relationships between functional traits and success (abundance), it may be possible to elucidate general principles that govern much of the structuring of ectomycorrhizal fungal communities. F We also thank Erwin Dreyer and two anonymous reviewers for exceptionally helpful advice leading to a new synthesis of some of the ideas presented herein. Bioassessment in a metacommunity context: Are diatom communities structured solely by species sorting? (2008) also found evidence of temporal partitioning in a Quercus forest. I. One recalls with wonder, amazement and some degree of revulsion the n-dimensions of Hutchinson’s “hypervolume” (Hutchinson 1957). In other words, species of a single community are predicted to possess common traits that adapt them to the same conditions. Springer, Berlin, pp 343–365, Theodorou C, Bowen GD (1971) Influence of temperature on the mycorrhizal associations of Pinus radiata D. Don Austral J Bot 19:13–20, Tibbett M, Sanders FE, Cairney JWG (1998) The effect of temperature and inorganic phosphorus supply on growth and acid phosphates production in arctic and temperate strains of ectomycorrhizal Hebeloma spp. 2007) and by a recent study by Dickie et al. Do small barriers affect the movement of freshwater fish by increasing residency?
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