Dispersal mode and spatial extent influence distance-decay patterns in pond metacommunities

Tornero, Irene; Boix, Dani; Bagella, Simonetta; Pinto-Cruz, Carla; Caria, Maria Carmela; Belo, Anabela D. F.; Lumbreras, Ana; Sala, Jordi; Compte, Jordi; Gascón, Stéphanie

doi:10.1371/journal.pone.0203119

Cited by 28 publications

(21 citation statements)

References 68 publications

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“…Dispersal also ultimately affects the distribution and composition of benthic invertebrates (Grönroos et al, 2013;Kärnä et al, 2015;Tonkin et al, 2018;Tornero et al, 2018;Gansfort & Traunspurger, 2019). However, these organisms are inhabitants of aquatic islands that are often not directly connected to similar habitats but are instead surrounded by a ''dry ocean'' (Incagnone et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

The ability to get everywhere: dispersal modes of free-living, aquatic nematodes

Ptatscheck

Traunspurger

2020

Hydrobiologia

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Nematodes colonize almost all aquatic habitats worldwide. Despite their small size, restricted locomotion and lack of pelagic larvae, they can reach even isolated habitats within a short time. In this review, we examine the underlying dispersal modes, considering their active movement in substrates and water, their drift by water and wind, rafting, zoochory as well as human-mediated vectors. These modes are limited by morphology and habitat structure, ecological factors and especially by hydrodynamics. Active dispersal is effective over short distances, but with increasing water-flow velocity, passive dispersal modes, which enable long-range transfer, become important. In fact, the transport of nematodes over thousands of kilometers via ship water tanks and by hitchhiking on sea turtles has been documented. Overland dispersal vectors include wind and birds whereas rafting enables an aggregated distribution because food is available, and reproduction is possible onboard the rafts. The diversity of possible dispersal modes is high and offers a reasonably chance for gravid females or groups of nematodes to be transferred even to remote environments. Their immigration is continuous, and supported by their rapid, parthenogenetic reproduction, nematodes are effective pioneers with the ability to (re)colonize new or disturbed habitats or rebalance already existing communities.

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Section: Introductionmentioning

confidence: 99%

The ability to get everywhere: dispersal modes of free-living, aquatic nematodes

Ptatscheck

Traunspurger

2020

Hydrobiologia

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“…Conversely, the slope of the community composition of both Type II and Type I (low affinity) methanotrophs, changed more slowly than the slope variables comprising environmental similarity when compared to changes in the geographic distance. This suggests that neutral processes are operating on these communities (35).…”

Section: Biogeography Of Methanotroph Communities Methanotrophic Communitiesmentioning

confidence: 99%

“…The community composition of high affinity methanotrophs changed faster than the environmental variables. This suggests that process like community sorting are operating on this community (35). If community sorting is operating on high-affinity methanotrophs, they may be actively adjusting to the cave environment and preventing the establishment of other groups of organisms in this environment.…”

Section: Biogeography Of Methanotroph Communities Methanotrophic Communitiesmentioning

confidence: 99%

Diversity and composition of methanotroph communities in caves

Schimmelmann

Drobniak

et al. 2018

Preprint

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Methane oxidizing microorganisms (methanotrophs) are a major sink for the 19 greenhouse gas methane (CH4), and have been investigated in several environments. 20Recent studies show that CH4 consumption in caves is pervasive and is a result of active 21 methanotrophy. However, little is known about what controls the distribution and 22 abundance of methanotrophs in caves. We sampled 42 sediments from 21 caves in North 23America to elucidate the factors shaping cave methanotroph communities. We 24hypothesized that cave methanotroph communities should be related to cave-air CH4 25 concentrations and exhibit dispersal-limited biogeographical patterns due to the insular 26 nature of caves. Using 16S rRNA sequencing, we recovered methanotrophs from 88 % of 27 samples collected, including locations in caves where CH4 concentrations were at or below 28 detection limits (≤ 0.3 ppmv). Methanotrophs from the Methylocystaceae (Type II) were 29 the dominant methanotrophs as has been seen in other environments with low CH4 30 concentrations. Despite being insular ecosystems, we found that the composition of 31 methanotrophs did not vary with distance, both within and among caves. Instead, we found 32 evidence for a core microbiome, perhaps suggesting that high-affinity methanotrophs are 33 not dispersal limited. Additionally, we observed that the relative abundance of 34 methanotrophs was positively related the proportion of gravel in cave sediments and the 35 relative abundance of methylotrophs. Last, we found that the relative abundance of 36 methanotrophs was inversely correlated with cave-air CH4 concentrations. Our results 37 suggest that methanotrophs in caves have influences on cave biogeochemistry beyond CH4 38 oxidation and that high-affinity methanotrophs may disperse easily into caves. 39 40 IMPORTANCE Recent observations have shown that the atmospheric greenhouse gas 41 methane (CH4) is consumed by microorganisms (methanotrophs) in caves at rates 42 comparable to CH4 oxidation in surface soils. Caves are abundant in karst landscapes that 43 comprise 14 % of Earth's land surface area, and therefore may be acting as a substantial 44 CH4 sink. A detailed ecological understanding of the forces that shape methanotrophic 45 communities in caves is lacking. We sampled cave sediments to better understand the 46 community composition and structure of cave methanotrophs. Our results show that the 47 relative abundance of methanotrophs was negatively correlated with CH4 concentrations in 48 cave air and that methanotrophic communities were similar to each other over distances of 49 10s of m to 100s of km. 50 51

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“…Distance decay patterns result from a combination of spatial variation in environmental factors, and the dispersal ability and environmental tolerances of organisms [41]. Distance decay patterns have been observed in a wide variety of organisms [42]; including trees [41], predatory invertebrates [43], and aquatic communities [44,45].…”

Section: Distance-decaymentioning

confidence: 99%

Climate gradients, and patterns of biodiversity and biotic homogenization in urban residential yards

Bergey

Whipkey

2020

PLoS ONE

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Residential yards constitute a substantive biodiverse greenspace within urban areas. This biodiversity results from a combination of native and non-native species and can contribute to biotic homogenization. Geographical climatic patterns affect the distribution of native species and may differently affect non-native species. In this study, we examined biodiversity and biotic homogenization patterns of yard-dwelling land snails across 12 towns in Oklahoma and Kansas (USA). The 3 x 4 array of towns incorporated a N-S winter temperature gradient (mean low January temperature range =-8.4 to 0.1˚C) and an E-W annual rainfall gradient (annual rainfall range = 113.8 to 61.3 cm/yr). Ten yards per town were surveyed. We hypothesized that mild winter temperatures and greater annual rainfall would be associated with greater snail abundance and richness, and that the presence of non-native species would contribute to biotic homogenization. Non-native snails were present and often abundant in all towns. Snail communities varied with both rainfall and cold temperature. Contrary to our prediction, snail abundance was inversely related to annual rainfall-likely because drier conditions resulted in greater yard watering that both augmented rainfall and maintained moist conditions. Sørensen similarity between towns for the entire land snail community and for only non-native species both showed distance-decay patterns, with snail composition becoming less similar with increasing distance-patterns resulting from species turnover. The biotic homogenization index also showed a distance-related pattern, such that closer towns were more likely to have biotic homogenization whereas more distant towns tended to have biotic differentiation. These results support the concept that biotic homogenization is more likely regionally and that climatic changes over distance result in species turnover and can reduce spatially broad biotic homogenization.

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Dispersal mode and spatial extent influence distance-decay patterns in pond metacommunities

Cited by 28 publications

References 68 publications

The ability to get everywhere: dispersal modes of free-living, aquatic nematodes

The ability to get everywhere: dispersal modes of free-living, aquatic nematodes

Diversity and composition of methanotroph communities in caves

Climate gradients, and patterns of biodiversity and biotic homogenization in urban residential yards

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