scholarly journals Experimental parasite community ecology: intraspecific variation in a large tapeworm affects community assembly

2016 ◽  
Vol 85 (4) ◽  
pp. 1004-1013 ◽  
Author(s):  
Daniel P. Benesh ◽  
Martin Kalbe
2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Suvi Sallinen ◽  
Anna Norberg ◽  
Hanna Susi ◽  
Anna-Liisa Laine

Abstract Infection by multiple pathogens of the same host is ubiquitous in both natural and managed habitats. While intraspecific variation in disease resistance is known to affect pathogen occurrence, how differences among host genotypes affect the assembly of pathogen communities remains untested. In our experiment using cloned replicates of naive Plantago lanceolata plants as sentinels during a seasonal virus epidemic, we find non-random co-occurrence patterns of five focal viruses. Using joint species distribution modelling, we attribute the non-random virus occurrence patterns primarily to differences among host genotypes and local population context. Our results show that intraspecific variation among host genotypes may play a large, previously unquantified role in pathogen community structure.


2020 ◽  
Author(s):  
Joshua I. Brian ◽  
David C. Aldridge

AbstractUnderstanding how environmental drivers influence the construction of parasite communities, in addition to how parasites may interact at an infracommunity level, are fundamental requirements for the study of parasite ecology. Knowledge of how parasite communities are assembled will help to predict the risk of parasitism for hosts, and model how parasite communities may change under variable conditions. However, studies frequently rely on presence-absence data and examine multiple host species or sites, metrics which may be too coarse to characterise nuanced within-host patterns. Here, we utilise a novel host system, the freshwater mussel Anodonta anatina, to investigate how both the presence and abundance of 14 parasite taxa correlate with environmental drivers across 720 replicate parasite infracommunities. Using both redundancy analysis and a joint species distribution model, we model the impact of both host-level and environment-level characteristics on parasite structure, as well as parasite-parasite correlations after accounting for all other factors. We demonstrate that both niche- and neutral-based factors are important but to varying degrees across parasite species, suggesting that applying generalities to parasite community construction is too simplistic. Further, we show that presence-absence data fails to capture important density-dependent effects of parasite load for parasites with high abundance. Finally, we highlight that predicted parasite interaction networks vary greatly depending on whether abundance or presence-absence data is used. Our results emphasise the multi-faceted nature of parasite community assembly, and that future studies require careful consideration of the data used to infer community structure.


2018 ◽  
Vol 93 (1) ◽  
pp. 8-11 ◽  
Author(s):  
R. Poulin

AbstractIn recent decades, parasite community ecology has produced hundreds of studies on an ever-growing number of host species, and developed into an active sub-discipline of parasitology. However, this growth has been characterized by a lack of standards in the practices used by researchers, with many common approaches being flawed, unjustified or misleading. Here, in the hope of promoting advances in the study of parasite community ecology, I identify some of the most common errors or weaknesses in past studies, and propose ten simple rules for best practice in the field. They cover issues including, among others, taxonomic resolution, proper and justifiable analytical methods, higher-level replication, controlling for sampling effort or species richness, accounting for spatial distances, using experimental approaches, and placing raw data in the public domain. While knowledge of parasite communities has expanded in breadth, with more and more host species being studied, true progress has been very limited with respect to our understanding of fundamental general processes shaping these communities. It is hoped that the guidelines presented here can direct researchers away from the entrenched use of certain approaches flawed in design, analysis or interpretation, by offering a more rigorous and standardized set of practices, and, hopefully, a way forward.


2016 ◽  
Vol 31 (3) ◽  
pp. 768-777 ◽  
Author(s):  
Alice Classen ◽  
Ingolf Steffan‐Dewenter ◽  
William J. Kindeketa ◽  
Marcell K. Peters

2007 ◽  
Vol 22 (3) ◽  
pp. 133-139 ◽  
Author(s):  
Amy B. Pedersen ◽  
Andy Fenton

Diversity ◽  
2022 ◽  
Vol 14 (1) ◽  
pp. 28
Author(s):  
Muhammad Farooq ◽  
Xianfu Li ◽  
Zhengfei Li ◽  
Ronglong Yang ◽  
Zhen Tian ◽  
...  

While macroinvertebrates are extensively investigated in many river ecosystems, meta-community ecology perspectives in alpine streams are very limited. We assessed the role of ecological factors and temporal dynamics in the macroinvertebrate meta-community assembly of an alpine stream situated in a dry-hot valley of Baima Snow Mountain, China. We found that spatial structuring and environmental filtering jointly drive the structure of macroinvertebrate meta-community, with relative contributions to the variance in community composition changing over time. RDA ordination and variation partitioning indicate that environmental variables are the most important predictors of community organization in most scenarios, whereas spatial determinants also play a significant role. Moreover, the explanatory power, identity, and the relative significance of ecological factors change over time. Particularly, in the years 2018 and 2019, stronger environmental filtering was found shaping community assembly, suggesting that deterministic mechanisms predominated in driving community dynamics. However, spatial factors had a stronger predictive power on meta-community structures in 2017, implying conspicuous dispersal mechanisms which may be owing to increased connectivity amongst sites. Thereby, we inferred that the alpine stream macroinvertebrate metacommunity composition can be regulated by the interaction of both spatial processes and environmental filtering, with relative contributions varying over time. Based on these findings, we suggest that community ecology studies in aquatic systems should be designed beyond single snapshot investigations.


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