{"id":3343,"date":"2021-06-07T12:56:12","date_gmt":"2021-06-07T12:56:12","guid":{"rendered":"http:\/\/the-jena-experiment.de\/?p=3343"},"modified":"2021-06-07T12:56:55","modified_gmt":"2021-06-07T12:56:55","slug":"new-publication-from-dietrich-et-al-in-oecologia","status":"publish","type":"post","link":"https:\/\/the-jena-experiment.de\/index.php\/2021\/06\/07\/new-publication-from-dietrich-et-al-in-oecologia\/","title":{"rendered":"New publication from Dietrich et al. in Oecologia: Effects of plant species diversity on nematode community composition and diversity in a long-term biodiversity experiment"},"content":{"rendered":"\n<p class=\"justify\">Diversity loss has been shown to change the soil community; however,  little is known about long-term consequences and underlying mechanisms.  Here, we investigated how nematode communities are affected by plant  species richness and whether this is driven by resource quantity or  quality in 15-year-old plant communities of a long-term grassland  biodiversity experiment.<\/p>\n\n\n\n<p class=\"justify\">We extracted nematodes from 93 experimental  plots differing in plant species richness, and measured above- and  belowground plant biomass production and soil organic carbon  concentrations (C<sub>org<\/sub>) as proxies for resource quantity, as well as C\/N<sub>leaf<\/sub>  ratio and specific root length (SRL) as proxies for resource quality. <\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" width=\"856\" height=\"459\" src=\"\/wp-content\/uploads\/image-166.png\" alt=\"\" class=\"wp-image-3345\" srcset=\"\/wp-content\/uploads\/image-166.png 856w, \/wp-content\/uploads\/image-166-300x161.png 300w, \/wp-content\/uploads\/image-166-768x412.png 768w\" sizes=\"(max-width: 856px) 100vw, 856px\" \/><\/figure>\n\n\n\n<p class=\"justify\">We found that nematode community composition and diversity significantly  differed among plant species richness levels. This was mostly due to  positive plant diversity effects on the abundance and genus richness of  bacterial-feeding, omnivorous, and predatory nematodes, which benefited  from higher shoot mass and soil C<sub>org<\/sub> in species-rich plant  communities, suggesting control via resource quantity. In contrast,  plant-feeding nematodes were negatively influenced by shoot mass,  probably due to higher top-down control by predators, and were  positively related to SRL and C\/N<sub>leaf<\/sub>, indicating control via  resource quality. The decrease of the grazing pressure ratio (plant  feeders per root mass) with plant species richness indicated a higher  accumulation of plant-feeding nematodes in species-poor plant  communities. Our results, therefore, support the hypothesis that  soil-borne pathogens accumulate in low-diversity communities over time,  while soil mutualists (bacterial-feeding, omnivorous, predatory  nematodes) increase in abundance and richness in high-diversity plant  communities, which may contribute to the widely-observed positive plant  diversity-productivity relationship.<\/p>\n\n\n\n<h4>Reference:<\/h4>\n\n\n\n<p>Dietrich, P., Cesarz, S., Liu, T. <em>et al.<\/em> Effects of plant species diversity on nematode community composition and diversity in a long-term biodiversity experiment. <em>Oecologia<\/em>  (2021). <a href=\"https:\/\/doi.org\/10.1007\/s00442-021-04956-1\">https:\/\/doi.org\/10.1007\/s00442-021-04956-1<\/a><\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Diversity loss has been shown to change the soil community; however, little is known about long-term consequences and underlying mechanisms. Here, we investigated how nematode communities are affected by plant&hellip;<\/p>\n","protected":false},"author":2,"featured_media":3344,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[15,13],"tags":[],"_links":{"self":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/3343"}],"collection":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/comments?post=3343"}],"version-history":[{"count":2,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/3343\/revisions"}],"predecessor-version":[{"id":3347,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/posts\/3343\/revisions\/3347"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/media\/3344"}],"wp:attachment":[{"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/media?parent=3343"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/categories?post=3343"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/the-jena-experiment.de\/index.php\/wp-json\/wp\/v2\/tags?post=3343"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}