| Title | Earthworm co-invasion by Amynthas tokioensis and Amynthas agrestis affects soil microaggregate bacterial communities |
| Publication Type | Journal Article |
| Year of Publication | 2024 |
| Authors | West J.R, Herrick B.M, Whitman T. |
| Journal | Applied Soil Ecology |
| Volume | 195 |
| Pagination | 14 |
| Date Published | Mar |
| Type of Article | Article |
| ISBN Number | 0929-1393 |
| Accession Number | WOS:001134875000001 |
| Keywords | Aggregate, Aggregate fractionation, Agriculture, Amynthas agrestis, Amynthas tokioensis, assembly processes, carbon, Community assembly, hilgendorfi, microbial communities, oligochaeta, ordination, organic-matter dynamics, respiration, Soil ecology soil organic matter, temperature |
| Abstract | Earthworms restructure the soil environment through burrowing, consumption, and casting behaviors. Though non-native European Lumbricid earthworms are well-studied in North American soils, the Asian pheretimoid Amynthas tokioensis and Amynthas agrestis earthworms exhibit distinct ecological patterns that alter invaded habitats. In particular, the combination of disruptive bioturbation with earthworm-driven aggregate formation may affect soil structure, C protection, and microbial community assembly processes, such as dispersal and se-lection. We aimed to determine the effects of A. tokioensis and A. agrestis co-invasions in woodlands in Madison, WI, U.S. on soil bacterial communities and edaphic characteristics. Using 16S rRNA gene sequencing, we found that the activity of these Amynthas species earthworms significantly affected bacterial community composition, however, sites demonstrated different responses in compositional dissimilarity (i.e., beta diversity), and the relative influences of homogenizing community assembly processes (i.e., homogeneous selection and homoge-nizing dispersal). Overall, inconclusive support for the hypothesized homogenization of bacterial community composition driven by homogenizing community assembly processes indicates that the effects of A. tokioensis and A. agrestis pressure in these systems represent a departure from previously established soil disturbance para-digms. Instead, we conclude that aggregate formation via A. tokioensis and A. agrestis casting activity does not consistently impose a strong selective filter on soil bacterial communities, nor does the heightened earthworm activity necessarily act to meaningfully homogenize soil communities via dispersal. Overall increases in soil C and N under A. tokioensis and A. agrestis activity support previous work indicating enhanced decomposition and incorporation of soil litter, but future work could focus on long-term fate of microaggregate-protected C.
|
| Short Title | Appl. Soil Ecol.Appl. Soil Ecol. |
| Alternate Journal | Appl. Soil Ecol. |
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Times Cited: 2
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West, Jaimie R. Herrick, Bradley M. Whitman, Thea
Department of Energy's Office of Science; O.N. Allen Professorship (UW-Madison CALS); Louis and Elsa Thomsen Wisconsin Distinguished Graduate Fellowship (UW-Madison CALS); NSF EAGER grant [2024230]; Wisconsin Department of Natural Resources
Department of Energy's Office of Science. This work was financially supported by the O.N. Allen Professorship (UW-Madison CALS) , the Louis and Elsa Thomsen Wisconsin Distinguished Graduate Fellowship (UW-Madison CALS) , a NSF EAGER grant (award #2024230) , and the Wisconsin Department of Natural Resources.
2
9
Elsevier
Amsterdam
1873-0272
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