A paper reports Shannon and Simpson indices for soil nematodes, along with microbial activity.

✅ diversity and function both measured

Bray–Curtis distances between plots should be treated as one diversity metric.

✅ it is possible that we can get community composition data in each plot

A paper reports Faith’s PD for microbial communities and microbial activity.

✅ phylogenetic diversity included

A paper reports only the presence/absence of earthworms (no abundance, richness, or composition).

❌ presence–absence alone is not a diversity metric

A study measures peatland soil microbial diversity and respiration rates.

✅ A peatland is one type of terrestrial lands

Not sure about whether this study contain all necessary information.

✅ Include but with a comment of “?”(we can decide later) .

Not sure about whether this taxa are soil biota.

✅ Include but with a comment of “?”(we can decide later).

Biological soil crusts (BSCs) play a pivotal role in maintaining ecosystem stability and soil fertility in arid and semi-arid regions. However, the biogeographical differences in soil functional composition between cyanobacterial BSCs (C-BSCs) and moss BSCs (M-BSCs), particularly how environmental changes affect nutrient cycling strategies and microbial community functions, remain poorly understood. In this study, we investigated BSCs across aridity gradients (semi-humid, semi-arid, and arid regions) in China, focusing on carbon and nitrogen cycling pathways, enzyme activities, and nutrient acquisition strategies. It was found that aridity and BSC type had significant effects on the functional characteristics of microorganisms. This was demonstrated by significant differences in various soil microbial activities including enzyme activities and carbon and nitrogen nutrient cycling. With increasing aridity, C-BSCs exhibited reduced carbon cycling activity but enhanced nitrogen cycling processes, whereas M-BSCs displayed diminished activity in both carbon and nitrogen cycling. These divergent strategies were linked to soil properties such as pH and organic carbon content, with C-BSCs adapting through nitrogen-related processes (e.g., nifH, amoA) and M-BSCs relying on C fixation and degradation. These findings provide novel insights into the functional gene diversity of BSCs across different regions, offering valuable references for ecological restoration in arid areas. Specifically, our study highlights the potential of BSC inoculation for carbon and nitrogen enrichment in arid regions, with implications for climate-resilient restoration practices.

✅ key info: soil functional composition between cyanobacterial BSCs (C-BSCs) and moss BSCs (M-BSCs); focusing on carbon and nitrogen cycling pathways, enzyme activities, and nutrient acquisition strategies; effects on the functional characteristics of microorganisms

Microbial colonization of glacial ice surfaces incurs feedbacks which affect the melting rate of the ice surface. Ecosystems formed as microbe-mineral aggregates termed cryoconite locally reduce ice surface albedo and represent foci of biodiversity and biogeochemical cycling. Consequently, greater understanding the ecological processes in the formation of functional cryoconite ecosystems upon glacier surfaces is sought. Here, we present the first bacterial biogeography of an ice cap, evaluating the respective roles of dispersal, environmental and biotic filtration occurring at local scales in the assembly of cryoconite microbiota. 16S rRNA gene amplicon semiconductor sequencing of cryoconite colonizing a Svalbard ice cap coupled with digital elevation modelling of physical parameters reveals the bacterial community is dominated by a ubiquitous core of generalist taxa, with evidence for a moderate pairwise distance-decay relationship. While geographic position and melt season duration are prominent among environmental predictors of community structure, the core population of taxa appears highly influential in structuring the bacterial community. Taxon co-occurrence network analysis reveals a highly modular community structured by positive interactions with bottleneck taxa, predominantly Actinobacteria affiliated to isolates from soil humus. In contrast, the filamentous cyanobacterial taxon (assigned to Leptolyngbya/Phormidesmis pristleyi) which dominates the community and binds together granular cryoconite are poorly connected to other taxa. While our study targeted one ice cap, the prominent role of generalist core taxa with close environmental relatives across the global cryosphere indicate discrete roles for cosmopolitan Actinobacteria and Cyanobacteria as respective keystone taxa and ecosystem engineers of cryoconite ecosystems colonizing ice caps.

❌ no soil biota, glacial ice surfaces

In this study we provide the first data regarding community parameters of leaf-litter anurans inhabiting a forest floor in the state of Parana, southern Brazil, including information on community species richness, composition, specific density and biomass. Our study was conducted at Salto Morato Natural Reserve using forty plots of 4 x 4 m for each one of the four seasons (winter, spring, summer and autumn), totaling 2.560 m(2) of forest floor sampled. We sampled a total of 96 frogs inhabiting the forest floor, belonging to seven species: Brachycephalus hermogenesi (Giaretta & Sawaya, 1998), lschnocnema guentheri (Steindachner, 1864), Haddadus binotatus (Spix, 1824), Leptodactylus gr. marmoratus, Physalaemus spiniger (Miranda-Ribeiro, 1926), Proceratophrys boiei (Wied-Neuwied, 1824), and Rhinella abei (Baldissera, Caramaschi & Haddad, 2004). The overall frog density in the forest floor was 3.73 ind/100m(2), with I. guentheri (1.37 ind/100 m(2)) being the most common species and R. abei (0.19 ind/100 m(2)), the rarest. The estimated overall frog mass in the community was 3.29 g. The abundance, richness and density varied consistently among the four seasons sampled, with the highest values occurring in the spring and summer seasons.

❌ No soil biota, No ecosystem functions

Replanting disease is a complex system of stressors affecting multiple biological processes, consequently shaping the soil microbial community structure. However, only a few studies have focused on the fauna of the rhizo-sphere soil. In addition, the effects of replanting disease on the diversity of the faunal community are poorly understood. We collected samples of Radix pseudostellariae rhizosphere soils in different consecutive monoculture fields from three geo-authentic production zones. The microbial abundance and soil faunal community diversity were analyzed using qRT-PCR and 18S rRNA gene sequencing, respectively. Continuous monoculture significantly increased the diversity of the soil nematodes. A total of 14 faunal phyla were detected among all samples, which predominantly included Nematoda, Chordata, Annelida, Arthropoda, Platyhelminthes, Gastrotricha, and Apicomplexa. Compared to the 1-year monoculture, continuous monoculture significantly increased the relative abundances of plant parasites, plant pathogens, phototrophs, and parasites, while significantly reducing the relative abundance of omnivores. Co-occurrence network analysis indicated that continuous monoculture increased the connections and positive correlations of the nematode community. Spearman correlation analysis showed that the soil faunal taxa were significantly associated with various soil factors (pH, sucrase, NO, total bacterial, and fungal abundance). Our findings have extended our knowledge regarding the effect of replanting disease on the functional composition of rhizosphere fauna, and the results highlight the role of continuous monoculture in shaping faunal community diversity.

✅ key info: focused on the fauna of the rhizo-sphere soil; the diversity of the faunal community; The microbial abundance and soil faunal community diversity; increased the relative abundances of plant parasites, plant pathogens, phototrophs, and parasites

Flashcard_SoilBEF_paper_screening Flashcards

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29 questions

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1.

FLASHCARD QUESTION

Front

A paper measures soil microbial diversity and CO₂ efflux.

Back

✅

both biodiversity and ecosystem function are measured

2.

FLASHCARD QUESTION

Front

A paper measures soil pH and organic matter.

Back

❌

no soil biota measured

3.

FLASHCARD QUESTION

Front

A paper measures plant diversity and biomass but no soil data.

Back

❌

no soil biodiversity

4.

FLASHCARD QUESTION

Front

A study manipulates nitrogen input and measures soil fauna diversity.

Back

✅

treatment affects ecosystem functions

5.

FLASHCARD QUESTION

Front

A study applies antibiotics to soil and measures microbial activity.

Back

❌

microbial activity is an ecosystem function metric, but no biodiversity metric was measured

6.

FLASHCARD QUESTION

Front

A study changes soil moisture experimentally and measures both decomposition and microbial diversity.

Back

✅

includes both function and biodiversity

7.

FLASHCARD QUESTION

Front

A paper studies surface-foraging ants and their ecosystem functions, but there is no clear soil connection.

Back

✅

keep for now; final decision during PDF reading

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