keyword
MENU ▼
Read by QxMD icon Read
search

Mutualistic network

keyword
https://www.readbyqxmd.com/read/27928035/quantifying-species-contributions-to-ecosystem-processes-a-global-assessment-of-functional-trait-and-phylogenetic-metrics-across-avian-seed-dispersal-networks
#1
Alexander L Pigot, Tom Bregman, Catherine Sheard, Benjamin Daly, Rampal S Etienne, Joseph A Tobias
Quantifying the role of biodiversity in ecosystems not only requires understanding the links between species and the ecological functions and services they provide, but also how these factors relate to measurable indices, such as functional traits and phylogenetic diversity. However, these relationships remain poorly understood, especially for heterotrophic organisms within complex ecological networks. Here, we assemble data on avian traits across a global sample of mutualistic plant-frugivore networks to critically assess how the functional roles of frugivores are associated with their intrinsic traits, as well as their evolutionary and functional distinctiveness...
December 14, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27882646/symb-and-symc-two-membrane-associated-proteins-are-required-for-epichlo%C3%A3-festucae-hyphal-cell-cell-fusion-and-maintenance-of-a-mutualistic-interaction-with-lolium-perenne
#2
Kimberly A Green, Yvonne Becker, Aiko Tanaka, Daigo Takemoto, Helen L Fitzsimons, Stephan Seiler, Hervé Lalucque, Philippe Silar, Barry Scott
Cell-cell fusion in fungi is required for colony formation, nutrient transfer and signal transduction. Disruption of genes required for hyphal fusion in Epichloë festucae, a mutualistic symbiont of Lolium grasses, severely disrupts the host interaction phenotype. We examined whether symB and symC, the E. festucae homologs of Podospora anserina self-signaling genes IDC2 and IDC3, are required for E. festucae hyphal fusion and host symbiosis. Deletion mutants of these genes were defective in hyphal cell fusion, formed intra-hyphal hyphae, and had enhanced conidiation...
November 23, 2016: Molecular Microbiology
https://www.readbyqxmd.com/read/27881755/unravelling-darwin-s-entangled-bank-architecture-and-robustness-of-mutualistic-networks-with-multiple-interaction-types
#3
Wesley Dáttilo, Nubia Lara-Rodríguez, Pedro Jordano, Paulo R Guimarães, John N Thompson, Robert J Marquis, Lucas P Medeiros, Raul Ortiz-Pulido, Maria A Marcos-García, Victor Rico-Gray
Trying to unravel Darwin's entangled bank further, we describe the architecture of a network involving multiple forms of mutualism (pollination by animals, seed dispersal by birds and plant protection by ants) and evaluate whether this multi-network shows evidence of a structure that promotes robustness. We found that species differed strongly in their contributions to the organization of the multi-interaction network, and that only a few species contributed to the structuring of these patterns. Moreover, we observed that the multi-interaction networks did not enhance community robustness compared with each of the three independent mutualistic networks when analysed across a range of simulated scenarios of species extinction...
November 30, 2016: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/27870034/measuring-partner-choice-in-plant-pollinator-networks-using-null-models-to-separate-rewiring-and-fidelity-from-chance
#4
Molly MacLeod, Mark A Genung, John S Ascher, Rachael Winfree
Recent studies of mutualistic networks show that interactions between partners change across years. Both biological mechanisms and chance could drive these patterns, but the relative importance of these factors has not been separated. We established a field experiment consisting of 102 monospecific plots of 17 native plant species, from which we collected 6713 specimens of 52 bee species over four years. We used these data and a null model to determine whether bee species' foraging choices varied more or less over time beyond the variation expected by chance...
November 2016: Ecology
https://www.readbyqxmd.com/read/27778383/natural-history-matters-how-biological-constraints-shape-diversified-interactions-in-pollination-networks
#5
Pedro Jordano
Species-specific traits constrain the ways organisms interact in nature. Some pairwise interactions among coexisting species simply do not occur; they are impossible to observe despite the fact that partners coexist in the same place. The author discusses these 'forbidden links' of species interaction networks. Photo: a sphingid moth, Manduca sexta visiting a flower of Tocoyena formosa (Rubiaceae) in the Brazilian Cerrado; tongue and corolla tube lengths approximately 100 mm. Courtesy of Felipe Amorim. Sazatornil, F...
November 2016: Journal of Animal Ecology
https://www.readbyqxmd.com/read/27770757/the-mycobiome-%C3%A2-a-friendly-cross-talk-between-fungal-colonizers-and-their-host
#6
Dworecka-Kaszak Bożena, Dąbrowska Iwona, Kaszak Ilona
The organisms colonizing a living host create together with their host a holobiome. The holobioms are networks of mutualistic interactions between host`s cells and microorganisms communities. The fungi are among these microorganisms and have been also well known to infect human and animals. These organisms are associated with a wide range of diseases as superficial or systemic mycoses. Fungi as colonizers can also modify host physiology and metabolism, energy acquisition, vitamin-cofactor availability, development and function of immune system, and even host behavior...
October 1, 2016: Annals of Parasitology
https://www.readbyqxmd.com/read/27688206/arbuscular-mycorrhizal-symbiosis-requires-a-phosphate-transceptor-in-the-gigaspora-margarita-fungal-symbiont
#7
Xianan Xie, Hui Lin, Xiaowei Peng, Congrui Xu, Zhongfeng Sun, Kexin Jiang, Antian Huang, Xiaohui Wu, Nianwu Tang, Alessandra Salvioli, Paola Bonfante, Bin Zhao
The majority of terrestrial vascular plants are capable of forming mutualistic associations with obligate biotrophic arbuscular mycorrhizal (AM) fungi from the phylum Glomeromycota. This mutualistic symbiosis provides carbohydrates to the fungus, and reciprocally improves plant phosphate uptake. AM fungal transporters can acquire phosphate from the soil through the hyphal networks. Nevertheless, the precise functions of AM fungal phosphate transporters, and whether they act as sensors or as nutrient transporters, in fungal signal transduction remain unclear...
December 5, 2016: Molecular Plant
https://www.readbyqxmd.com/read/27648235/top-down-network-analysis-characterizes-hidden-termite-termite-interactions
#8
Colin Campbell, Laura Russo, Alessandra Marins, Og DeSouza, Karsten Schönrogge, David Mortensen, John Tooker, Réka Albert, Katriona Shea
The analysis of ecological networks is generally bottom-up, where networks are established by observing interactions between individuals. Emergent network properties have been indicated to reflect the dominant mode of interactions in communities that might be mutualistic (e.g., pollination) or antagonistic (e.g., host-parasitoid communities). Many ecological communities, however, comprise species interactions that are difficult to observe directly. Here, we propose that a comparison of the emergent properties from detail-rich reference communities with known modes of interaction can inform our understanding of detail-sparse focal communities...
September 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27547328/invading-a-mutualistic-network-to-be-or-not-to-be-similar
#9
Henintsoa Onivola Minoarivelo, Cang Hui
Biological invasion remains a major threat to biodiversity in general and a disruptor to mutualistic interactions in particular. While a number of empirical studies have directly explored the role of invasion in mutualistic pollination networks, a clear picture is yet to emerge and a theoretical model for comprehension still lacking. Here, using an eco-evolutionary model of bipartite mutualistic networks with trait-mediated interactions, we explore invader trait, propagule pressure, and network features of recipient community that contribute importantly to the success and impact of an invasion...
July 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27487095/prospects-for-arbuscular-mycorrhizal-fungi-amf-to-assist-in-phytoremediation-of-soil-hydrocarbon-contaminants
#10
REVIEW
Monika Rajtor, Zofia Piotrowska-Seget
Arbuscular mycorrhizal fungi (AMF) form mutualistic associations with the roots of 80-90% of vascular plant species and may constitute up to 50% of the total soil microbial biomass. AMF have been considered to be a tool to enhance phytoremediation, as their mycelium create a widespread underground network that acts as a bridge between plant roots, soil and rhizosphere microorganisms. Abundant extramatrical hyphae extend the rhizosphere thus creating the hyphosphere, which significantly increases the area of a plant's access to nutrients and contaminants...
November 2016: Chemosphere
https://www.readbyqxmd.com/read/27469305/the-regulation-of-secondary-metabolism-in-photorhabdus
#11
David J Clarke
A general definition of secondary metabolism is that it consists of the metabolic pathways and the products of metabolism that are not absolutely required for the survival of the organism. Using this definition, it is now well established that Photorhabdus elaborate an extensive secondary metabolism during the post-exponential phase of bacterial growth. This secondary metabolism includes, but is not limited to, the production of light, a stilbene antibiotic and an anthraquinone pigment. In this chapter, the role of secondary metabolism during the life cycle of Photorhabdus will be discussed...
July 29, 2016: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/27429761/geographical-variation-in-the-heterogeneity-of-mutualistic-networks
#12
Shoko Sakai, Soeren Metelmann, Yukihiko Toquenaga, Arndt Telschow
Plant-animal mutualistic networks are characterized by highly heterogeneous degree distributions. The majority of species interact with few partner species, while a small number are highly connected to form network hubs that are proposed to play an important role in community stability. It has not been investigated, however, if or how the degree distributions vary among types of mutualisms or communities, or between plants and animals in the same network. Here, we evaluate the degree distributions of pollination and seed-dispersal networks, which are two major types of mutualistic networks that have often been discussed in parallel, using an index based on Pielou's evenness...
June 2016: Royal Society Open Science
https://www.readbyqxmd.com/read/27349105/modularity-pollination-systems-and-interaction-turnover-in-plant-pollinator-networks-across-space
#13
Daniel W Carstensen, Malena Sabatino, Leonor Patricia C Morellato
Mutualistic interaction networks have been shown to be structurally conserved over space and time while pairwise interactions show high variability. In such networks, modularity is the division of species into compartments, or modules, where species within modules share more interactions with each other than they do with species from other modules. Such a modular structure is common in mutualistic networks and several evolutionary and ecological mechanisms have been proposed as underlying drivers. One prominent explanation is the existence of pollination syndromes where flowers tend to attract certain pollinators as determined by a set of traits...
May 2016: Ecology
https://www.readbyqxmd.com/read/27330852/temporal-changes-in-the-structure-of-a-plant-frugivore-network-are-influenced-by-bird-migration-and-fruit-availability
#14
Michelle Ramos-Robles, Ellen Andresen, Cecilia Díaz-Castelazo
Background. Ecological communities are dynamic collections whose composition and structure change over time, making up complex interspecific interaction networks. Mutualistic plant-animal networks can be approached through complex network analysis; these networks are characterized by a nested structure consisting of a core of generalist species, which endows the network with stability and robustness against disturbance. Those mutualistic network structures can vary as a consequence of seasonal fluctuations and food availability, as well as the arrival of new species into the system that might disorder the mutualistic network structure (e...
2016: PeerJ
https://www.readbyqxmd.com/read/27323666/stability-of-an-adaptive-hybrid-community
#15
A Mougi
Contrary to stable natural ecosystems, the classical ecological theory predicts that complex ecological communities are fragile. The adaptive switching of interaction partners was proposed as a key factor to resolve the complexity-stability problem. However, this theory is based on the food webs that comprise predator-prey interactions alone; thus, the manner in which adaptive behavior affects the dynamics of hybrid communities with multiple interaction types remains unclear. Here, using a bipartite community network model with antagonistic and mutualistic interactions, I show that adaptive partner shifts by both antagonists and mutualists are crucial to the persistence of communities...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27322185/human-impacts-and-climate-change-influence-nestedness-and-modularity-in-food-web-and-mutualistic-networks
#16
Kazuhiro Takemoto, Kosuke Kajihara
Theoretical studies have indicated that nestedness and modularity-non-random structural patterns of ecological networks-influence the stability of ecosystems against perturbations; as such, climate change and human activity, as well as other sources of environmental perturbations, affect the nestedness and modularity of ecological networks. However, the effects of climate change and human activities on ecological networks are poorly understood. Here, we used a spatial analysis approach to examine the effects of climate change and human activities on the structural patterns of food webs and mutualistic networks, and found that ecological network structure is globally affected by climate change and human impacts, in addition to current climate...
2016: PloS One
https://www.readbyqxmd.com/read/27277141/an-epichlo%C3%A3-festucae-homologue-of-mob3-a-component-of-the-stripak-complex-is-required-for-the-establishment-of-a-mutualistic-symbiotic-interaction-with-lolium-perenne
#17
Kimberly A Green, Yvonne Becker, Helen L Fitzsimons, Barry Scott
In both Sordaria macrospora and Neurospora crassa, components of the conserved STRIPAK (striatin-interacting phosphatase and kinase) complex regulate cell-cell fusion, hyphal network development and fruiting body formation. Interestingly, a number of Epichloë festucae genes that are required for hyphal cell-cell fusion, such as noxA, noxR, proA, mpkA and mkkA, are also required for the establishment of a mutualistic symbiotic interaction with Lolium perenne. To determine whether MobC, a homologue of the STRIPAK complex component MOB3 in S...
December 2016: Molecular Plant Pathology
https://www.readbyqxmd.com/read/27271037/the-antsy-social-network-determinants-of-nest-structure-and-arrangement-in-asian-weaver-ants
#18
Kadambari Devarajan
Asian weaver ants (Oecophylla smaragdina) are arboreal ants that are known to form mutualistic complexes with their host trees. They are eusocial ants that build elaborate nests in the canopy in tropical areas. A colony comprises of multiple nests, usually on multiple trees, and the boundaries of the colony may be difficult to identify. However, they provide the ideal model for studying group living in invertebrates since there are a definite number of nests for a given substrate, the tree. Here, we briefly examine the structure of the nests and the processes involved in the construction and maintenance of these nests...
2016: PloS One
https://www.readbyqxmd.com/read/27255514/the-structure-of-legume-rhizobium-interaction-networks-and-their-response-to-tree-invasions
#19
Johannes J Le Roux, Natasha R Mavengere, Allan G Ellis
Establishing mutualistic interactions in novel environments is important for the successful establishment of some non-native plant species. These associations may, in turn, impact native species interaction networks as non-natives become dominant in their new environments. Using phylogenetic and ecological interaction network approaches we provide the first report of the structure of belowground legume-rhizobium interaction networks and how they change along a gradient of invasion (uninvaded, semi invaded and heavily invaded sites) by Australian Acacia species in South Africa's Cape Floristic Region...
2016: AoB Plants
https://www.readbyqxmd.com/read/27220207/how-plants-connect-pollination-and-herbivory-networks-and-their-contribution-to-community-stability
#20
Alix M C Sauve, Elisa Thébault, Michael J O Pocock, Colin Fontaine
Pollination and herbivory networks have mainly been studied separately, highlighting their distinct structural characteristics and the related processes and dynamics. However, most plants interact with both pollinators and herbivores, and there is evidence that both types of interaction affect each other. Here we investigated the way plants connect these mutualistic and antagonistic networks together, and the consequences for community stability. Using an empirical data set, we show that the way plants connect pollination and herbivory networks is not random and promotes community stability...
April 2016: Ecology
keyword
keyword
93387
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"