keyword
MENU ▼
Read by QxMD icon Read
search

Plant community tropical forest

keyword
https://www.readbyqxmd.com/read/29228017/two-decades-of-climate-driving-the-dynamics-of-functional-and-taxonomic-diversity-of-a-tropical-small-mammal-community-in-western-mexico
#1
Edgard David Mason-Romo, Ariel A Farías, Gerardo Ceballos
Understanding the effects of global climate disruption on biodiversity is important to future conservation efforts. While taxonomic diversity is widely studied, functional diversity of plants, and recently animals, is receiving increasing attention. Most studies of mammals are short-term, focus on temperate habitats, and rely on traits described in the literature rather than generating traits from observations. Unlike previous studies, this long-term field study assessed the factors driving the functional and taxonomic diversity of small-mammal assemblages in dry tropical forests using both traits recorded from literature and a demographic database...
2017: PloS One
https://www.readbyqxmd.com/read/29196341/vapor-pressure-deficit-predicts-epiphyte-abundance-across-an-elevational-gradient-in-a-tropical-montane-region
#2
Sybil G Gotsch, Kenneth Davidson, Jessica G Murray, Vanessa J Duarte, Danel Draguljić
PREMISE OF THE STUDY: Tropical Montane Cloud Forests (TMCFs) are important ecosystems to study and preserve because of their high biodiversity and critical roles in local and regional ecosystem processes. TMCFs may be particularly affected by changes in climate because of the narrow bands of microclimate they occupy and the vulnerability of TMCF species to projected increases in cloud base heights and drought. A comprehensive understanding of the structure and function of TMCFs is lacking and difficult to attain because of variation in topography within and across TMCF sites...
December 1, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/29184976/distinctive-soil-archaeal-communities-in-different-variants-of-tropical-equatorial-forest
#3
Dorsaf Kerfahi, Binu M Tripathi, J W Ferry Slik, Rahayu S Sukri, Salwana Jaafar, Jonathan M Adams
Little is known of how soil archaeal community composition and diversity differ between local variants of tropical rainforests. We hypothesized that (1) as with plants, animals, fungi, and bacteria, the soil archaeal community would differ between different variants of tropical forest; (2) that spatially rarer forest variants would have a less diverse archaeal community than common ones; (3) that a history of forest disturbance would decrease archaeal alpha- and beta-diversity; and (4) that archaeal distributions within the forest would be governed more by deterministic than stochastic factors...
November 29, 2017: Microbial Ecology
https://www.readbyqxmd.com/read/29163572/root-and-rhizosphere-bacterial-phosphatase-activity-varies-with-tree-species-and-soil-phosphorus-availability-in-puerto-rico-tropical-forest
#4
Kristine G Cabugao, Collin M Timm, Alyssa A Carrell, Joanne Childs, Tse-Yuan S Lu, Dale A Pelletier, David J Weston, Richard J Norby
Tropical forests generally occur on highly weathered soils that, in combination with the immobility of phosphorus (P), often result in soils lacking orthophosphate, the form of P most easily metabolized by plants and microbes. In these soils, mineralization of organic P can be the major source for orthophosphate. Both plants and microbes encode for phosphatases capable of mineralizing a range of organic P compounds. However, the activity of these enzymes depends on several edaphic factors including P availability, tree species, and microbial communities...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29127217/adding-landscape-genetics-and-individual-traits-to-the-ecosystem-function-paradigm-reveals-the-importance-of-species-functional-breadth
#5
Antonio R Castilla, Nathaniel S Pope, Megan O'Connell, María F Rodriguez, Laurel Treviño, Alonso Santos, Shalene Jha
Animal pollination mediates both reproduction and gene flow for the majority of plant species across the globe. However, past functional studies have focused largely on seed production; although useful, this focus on seed set does not provide information regarding species-specific contributions to pollen-mediated gene flow. Here we quantify pollen dispersal for individual pollinator species across more than 690 ha of tropical forest. Specifically, we examine visitation, seed production, and pollen-dispersal ability for the entire pollinator community of a common tropical tree using a series of individual-based pollinator-exclusion experiments followed by molecular-based fractional paternity analyses...
November 10, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29118136/variably-hungry-caterpillars-predictive-models-and-foliar-chemistry-suggest-how-to-eat-a-rainforest
#6
Simon T Segar, Martin Volf, Brus Isua, Mentap Sisol, Conor M Redmond, Margaret E Rosati, Bradley Gewa, Kenneth Molem, Chris Dahl, Jeremy D Holloway, Yves Basset, Scott E Miller, George D Weiblen, Juha-Pekka Salminen, Vojtech Novotny
A long-term goal in evolutionary ecology is to explain the incredible diversity of insect herbivores and patterns of host plant use in speciose groups like tropical Lepidoptera. Here, we used standardized food-web data, multigene phylogenies of both trophic levels and plant chemistry data to model interactions between Lepidoptera larvae (caterpillars) from two lineages (Geometridae and Pyraloidea) and plants in a species-rich lowland rainforest in New Guinea. Model parameters were used to make and test blind predictions for two hectares of an exhaustively sampled forest...
November 15, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29084355/variation-in-the-resilience-of-cloud-forest-vascular-epiphytes-to-severe-drought
#7
Sybil G Gotsch, Todd E Dawson, Danel Draguljić
Epiphytes are common in tropical montane cloud forests (TMCFs) and play many important ecological roles, but the degree to which these unique plants will be affected by changes in climate is unknown. We investigated the drought responses of three vascular epiphyte communities bracketing the cloud base during a severe, El Niño-impacted dry season. Epiphytes were instrumented with sap flow probes in each site. Leaf water potential and pressure-volume curve parameters were also measured before and during the drought...
October 30, 2017: New Phytologist
https://www.readbyqxmd.com/read/29075461/ants-as-ecological-indicators-of-rainforest-restoration-community-convergence-and-the-development-of-an-ant-forest-indicator-index-in-the-australian-wet-tropics
#8
Michael J Lawes, Anthony M Moore, Alan N Andersen, Noel D Preece, Donald C Franklin
Ecosystem restoration can help reverse biodiversity loss, but whether faunal communities of forests undergoing restoration converge with those of primary forest over time remains contentious. There is a need to develop faunal indicators of restoration success that more comprehensively reflect changes in biodiversity and ecosystem function. Ants are an ecologically dominant faunal group and are widely advocated as ecological indicators. We examine ant species and functional group responses on a chronosequence of rainforest restoration in northern Australia, and develop a novel method for selecting and using indicator species...
October 2017: Ecology and Evolution
https://www.readbyqxmd.com/read/29049301/plant-dna-barcodes-and-assessment-of-phylogenetic-community-structure-of-a-tropical-mixed-dipterocarp-forest-in-brunei-darussalam-borneo
#9
Jacqueline Heckenhauer, Kamariah Abu Salim, Mark W Chase, Kyle G Dexter, R Toby Pennington, Sylvester Tan, Maria Ellen Kaye, Rosabelle Samuel
DNA barcoding is a fast and reliable tool to assess and monitor biodiversity and, via community phylogenetics, to investigate ecological and evolutionary processes that may be responsible for the community structure of forests. In this study, DNA barcodes for the two widely used plastid coding regions rbcL and matK are used to contribute to identification of morphologically undetermined individuals, as well as to investigate phylogenetic structure of tree communities in 70 subplots (10 × 10m) of a 25-ha forest-dynamics plot in Brunei (Borneo, Southeast Asia)...
2017: PloS One
https://www.readbyqxmd.com/read/29040576/to-everything-there-is-a-season-summer-to-winter-food-webs-and-the-functional-traits-of-keystone-species
#10
Murray M Humphries, Emily K Studd, Allyson K Menzies, Stan Boutin
From a trophic perspective, a seasonal increase in air temperature and photoperiod propagates as bottom-up pulse of primary production by plants, secondary production by herbivores, and tertiary production by carnivores. However, food web seasonality reflects not only abiotic variation in temperature and photoperiod, but also the composition of the biotic community and their functional responses to this variation. Some plants and animals-here referred to as seasonal specialists-decouple from food webs in winter through migration or various forms of metabolic arrest (e...
November 1, 2017: Integrative and Comparative Biology
https://www.readbyqxmd.com/read/28973927/soilborne-fungi-have-host-affinity-and-host-specific-effects-on-seed-germination-and-survival-in-a-lowland-tropical-forest
#11
Carolina Sarmiento, Paul-Camilo Zalamea, James W Dalling, Adam S Davis, Simon M Stump, Jana M U'Ren, A Elizabeth Arnold
The Janzen-Connell (JC) hypothesis provides a conceptual framework for explaining the maintenance of tree diversity in tropical forests. Its central tenet-that recruits experience high mortality near conspecifics and at high densities-assumes a degree of host specialization in interactions between plants and natural enemies. Studies confirming JC effects have focused primarily on spatial distributions of seedlings and saplings, leaving major knowledge gaps regarding the fate of seeds in soil and the specificity of the soilborne fungi that are their most important antagonists...
October 24, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28963453/resistance-of-tropical-seedlings-to-drought-is-mediated-by-neighbourhood-diversity
#12
Michael J O'Brien, Glen Reynolds, Robert Ong, Andy Hector
Occasional periods of drought are typical of most tropical forests, but climate change is increasing drought frequency and intensity in many areas across the globe, threatening the structure and function of these ecosystems. The effects of intermittent drought on tropical tree communities remain poorly understood and the potential impacts of intensified drought under future climatic conditions are even less well known. The response of forests to altered precipitation will be determined by the tolerances of different species to reduced water availability and the interactions among plants that alleviate or exacerbate the effects of drought...
September 25, 2017: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/28948417/vegetation-ecology-and-carbon-sequestration-potential-of-shrubs-in-tropics-of-chhattisgarh-india
#13
Manoj Kumar Jhariya
Tropical forests are well known to have great species diversity and contribute substantial share in terrestrial carbon (C) stocks worldwide. Shrubs are long-neglected life form in the forest ecosystem, playing many roles in the forest and human life. Shrub has great impact on vegetation attributes which in turn modify the C storage and capture. In the present investigation, an attempt has been made to explore the dynamics of shrub species in four fire regimes, viz. high, medium, low, and no fire zones of Bhoramdeo Wildlife Sanctuary of Kawardha forest division (Chhattisgarh), India...
September 25, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28921844/functional-traits-determine-tree-growth-and-ecosystem-productivity-of-a-tropical-montane-forest-insights-from-a-long-term-nutrient-manipulation-experiment
#14
Selene Báez, Jürgen Homeier
Trait-response effects are critical to forecast community structure and biomass production in highly diverse tropical forests. Ecological theory and few observation studies indicate that trees with acquisitive functional traits would respond more strongly to higher resource availability than those with conservative traits. We assessed how long-term tree growth in experimental nutrient addition plots (N, P, and N + P) varied as a function of morphological traits, tree size, and species identity. We also evaluated how trait-based responses affected stand scale biomass production considering the community structure...
September 18, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28875896/kryptousia-macronema-gen-nov-sp-nov-and-kryptousia-microlepis-sp-nov-nostocalean-cyanobacteria-isolated-from-phyllospheres
#15
Danillo Oliveira Alvarenga, Ana Paula Dini Andreote, Luis Henrique Zanini Branco, Marli Fatima Fiore
Tropical ecosystems worldwide host very diverse microbial communities, but are increasingly threatened by deforestation and climate change. Thus, characterization of biodiversity in these environments, and especially of microbial communities that show unique adaptations to their habitats, is a very urgent matter. Information about representatives of the phylum Cyanobacteria in tropical environments is scarce, even though they are fundamental primary producers that help other microbes to thrive in nutrient-depleted habitats, including phyllospheres...
September 2017: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/28875172/the-biodiversity-cost-of-carbon-sequestration-in-tropical-savanna
#16
Rodolfo C R Abreu, William A Hoffmann, Heraldo L Vasconcelos, Natashi A Pilon, Davi R Rossatto, Giselda Durigan
Tropical savannas have been increasingly viewed as an opportunity for carbon sequestration through fire suppression and afforestation, but insufficient attention has been given to the consequences for biodiversity. To evaluate the biodiversity costs of increasing carbon sequestration, we quantified changes in ecosystem carbon stocks and the associated changes in communities of plants and ants resulting from fire suppression in savannas of the Brazilian Cerrado, a global biodiversity hotspot. Fire suppression resulted in increased carbon stocks of 1...
August 2017: Science Advances
https://www.readbyqxmd.com/read/28832611/a-degradation-debt-large-scale-shifts-in-community-composition-and-loss-of-biomass-in-a-tropical-forest-fragment-after-40-years-of-isolation
#17
Rakan A Zahawi, Federico Oviedo-Brenes, Chris J Peterson
Habitat loss and fragmentation are among the biggest threats to tropical biodiversity and associated ecosystem services. We examined forest dynamics in a mid-elevation 365-ha fragment in southern Costa Rica. The fragment was isolated in the mid-1970s and belongs to the Las Cruces Biological Station. A 2.25-ha permanent plot was established in the center of the old-growth forest (>400 m to nearest edge boundary) and all plants >5 cm DBH were censused, mapped, and identified to species in two surveys taken ~5-6 years apart (>3,000 stems/survey)...
2017: PloS One
https://www.readbyqxmd.com/read/28819747/word-wide-meta-analysis-of-quercus-forests-ectomycorrhizal-fungal-diversity-reveals-southwestern-mexico-as-a-hotspot
#18
Olimpia Mariana García-Guzmán, Roberto Garibay-Orijel, Edith Hernández, Elsa Arellano-Torres, Ken Oyama
Quercus is the most diverse genus of ectomycorrhizal (ECM) host plants; it is distributed in the Northern and Southern Hemispheres, from temperate to tropical regions. However, their ECM communities have been scarcely studied in comparison to those of conifers. The objectives of this study were to determine the richness of ECM fungi associated with oak forests in the Cuitzeo basin in southwestern Mexico; and to determine the level of richness, potential endemism and species similarity among ECM fungal communities associated with natural oak forests worldwide through a meta-analysis...
November 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28812652/parasites-dominate-hyperdiverse-soil-protist-communities-in-neotropical-rainforests
#19
Frédéric Mahé, Colomban de Vargas, David Bass, Lucas Czech, Alexandros Stamatakis, Enrique Lara, David Singer, Jordan Mayor, John Bunge, Sarah Sernaker, Tobias Siemensmeyer, Isabelle Trautmann, Sarah Romac, Cédric Berney, Alexey Kozlov, Edward A D Mitchell, Christophe V W Seppey, Elianne Egge, Guillaume Lentendu, Rainer Wirth, Gabriel Trueba, Micah Dunthorn
High animal and plant richness in tropical rainforest communities has long intrigued naturalists. It is unknown if similar hyperdiversity patterns are reflected at the microbial scale with unicellular eukaryotes (protists). Here we show, using environmental metabarcoding of soil samples and a phylogeny-aware cleaning step, that protist communities in Neotropical rainforests are hyperdiverse and dominated by the parasitic Apicomplexa, which infect arthropods and other animals. These host-specific parasites potentially contribute to the high animal diversity in the forests by reducing population growth in a density-dependent manner...
March 20, 2017: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/28808545/dioecious-plants-are-more-precocious-than-cosexual-plants-a-comparative-study-of-relative-sizes-at-the-onset-of-sexual-reproduction-in-woody-species
#20
Itsuki Ohya, Satoshi Nanami, Akira Itoh
The reproductive capacities of dioecious plant species may be limited by severe pollen limitation and narrow seed shadows for the two reasons. First, they are unable to self-pollinate, and seed production occurs only with pollinator movement from males to females. Second, only 50% of the individuals in populations contribute to seed production. Despite these handicaps, dioecious plants maintain their populations in plant communities with cooccurring cosexual plants, and no substantial difference in population growth rates has been found between dioecious and cosexual plants...
August 2017: Ecology and Evolution
keyword
keyword
87092
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"