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https://www.readbyqxmd.com/read/28350829/spatio-temporal-variation-of-fish-taxonomic-composition-in-a-south-east-asian-flood-pulse-system
#1
Heng Kong, Mathieu Chevalier, Pascal Laffaille, Sovan Lek
The Tonle Sap Lake (TSL) is a flood-pulse system. It is the largest natural lake in South-East Asia and constitutes one of the largest fisheries over the world, supporting the livelihood of million peoples. Nonetheless, the Mekong River Basin is changing rapidly due to accelerating water infrastructure development (hydropower, irrigation, flood control, and water supply) and climate change, bringing considerable modifications to the annual flood-pulse of the TSL. Such modifications are expected to have strong impacts on fish biodiversity and abundance...
2017: PloS One
https://www.readbyqxmd.com/read/28350825/antarctica-and-the-strategic-plan-for-biodiversity
#2
Steven L Chown, Cassandra M Brooks, Aleks Terauds, Céline Le Bohec, Céline van Klaveren-Impagliazzo, Jason D Whittington, Stuart H M Butchart, Bernard W T Coetzee, Ben Collen, Peter Convey, Kevin J Gaston, Neil Gilbert, Mike Gill, Robert Höft, Sam Johnston, Mahlon C Kennicutt, Hannah J Kriesell, Yvon Le Maho, Heather J Lynch, Maria Palomares, Roser Puig-Marcó, Peter Stoett, Melodie A McGeoch
The Strategic Plan for Biodiversity, adopted under the auspices of the Convention on Biological Diversity, provides the basis for taking effective action to curb biodiversity loss across the planet by 2020-an urgent imperative. Yet, Antarctica and the Southern Ocean, which encompass 10% of the planet's surface, are excluded from assessments of progress against the Strategic Plan. The situation is a lost opportunity for biodiversity conservation globally. We provide such an assessment. Our evidence suggests, surprisingly, that for a region so remote and apparently pristine as the Antarctic, the biodiversity outlook is similar to that for the rest of the planet...
March 2017: PLoS Biology
https://www.readbyqxmd.com/read/28346980/ecological-intensification-to-mitigate-impacts-of-conventional-intensive-land-use-on-pollinators-and-pollination
#3
REVIEW
Anikó Kovács-Hostyánszki, Anahí Espíndola, Adam J Vanbergen, Josef Settele, Claire Kremen, Lynn V Dicks
Worldwide, human appropriation of ecosystems is disrupting plant-pollinator communities and pollination function through habitat conversion and landscape homogenisation. Conversion to agriculture is destroying and degrading semi-natural ecosystems while conventional land-use intensification (e.g. industrial management of large-scale monocultures with high chemical inputs) homogenises landscape structure and quality. Together, these anthropogenic processes reduce the connectivity of populations and erode floral and nesting resources to undermine pollinator abundance and diversity, and ultimately pollination services...
March 27, 2017: Ecology Letters
https://www.readbyqxmd.com/read/28346736/loss-of-predator-species-not-intermediate-consumers-triggers-rapid-and-dramatic-extinction-cascades
#4
Ian Donohue, Owen L Petchey, Sonia Kéfi, Alexandre Génin, Andrew L Jackson, Qiang Yang, Nessa E O'Connor
Ecological networks are tightly interconnected, such that loss of a single species can trigger additional species extinctions. Theory predicts that such secondary extinctions are driven primarily by loss of species from intermediate or basal trophic levels. In contrast, most cases of secondary extinctions from natural systems have been attributed to loss of entire top trophic levels. Here, we show that loss of single predator species in isolation can, irrespective of their identity or the presence of other predators, trigger rapid secondary extinction cascades in natural communities far exceeding those generally predicted by theory...
March 27, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28345890/relationship-of-microbiota-and-cyanobacterial-secondary-metabolites-in-planktothricoides-dominated-bloom
#5
Shu Harn Te, Boon Fei Tan, Janelle Renee Thompson, Karina Yew-Hoong Gin
Identification of phytoplankton species and microbial biodiversity is necessary to assess water ecosystem health and the quality of water resources. We investigated the short-term (2 days) vertical and diel variations in bacterial community structure and microbially-derived secondary metabolites during a cyanobacterial bloom that emerged in a highly urbanized tropical reservoir. The waterbody was largely dominated by the cyanobacteria Planktothricoides spp., together with the Synechococcus, Pseudanabaena, Prochlorothrix and Limnothrix...
March 27, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28345054/many-shades-of-gray-the-context-dependent-performance-of-organic-agriculture
#6
REVIEW
Verena Seufert, Navin Ramankutty
Organic agriculture is often proposed as a more sustainable alternative to current conventional agriculture. We assess the current understanding of the costs and benefits of organic agriculture across multiple production, environmental, producer, and consumer dimensions. Organic agriculture shows many potential benefits (including higher biodiversity and improved soil and water quality per unit area, enhanced profitability, and higher nutritional value) as well as many potential costs including lower yields and higher consumer prices...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28344583/rbm25-mediates-abiotic-responses-in-plants
#7
Chunhong Cheng, Zhijuan Wang, Bingjian Yuan, Xia Li
Alternative splicing (AS) of pre-mRNAs is one of the most important post-transcriptional regulations that enable a single gene to code for multiple proteins resulting in the biodiversity of proteins in eukaryotes. Recently, we have shown that an Arabidopsis thaliana RNA recognition motif-containing protein RBM25 is a novel splicing factor to modulate plant response to ABA during seed germination and post-germination through regulating HAB1 pre-mRNA AS. Here, we show that RBM25 is preferentially expressed in stomata and vascular tissues in Arabidopsis and is induced by ABA and abiotic stresses...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28344378/the-long-and-the-short-of-it-a-global-analysis-of-hawkmoth-pollination-niches-and-interaction-networks
#8
Steven D Johnson, Marcela Moré, Felipe W Amorim, William A Haber, Gordon W Frankie, Dara A Stanley, Andrea A Coccuci, Robert A Raguso
1. Proboscis length has been proposed as a key dimension of plant pollination niches, but this niche space has not previously been explored at regional and global scales for any pollination system. Hawkmoths are ideal organisms for exploring pollinator niches as they are important pollinators in most of the biodiverse regions of the earth and vary greatly in proboscis length, with some species having the longest proboscides of all insects. 2. Using datasets for nine biogeographical regions spanning the Old and New World, we ask whether it is possible to identify distinct hawkmoth pollination niches based on the frequency distribution of proboscis length, and whether these niches are reflected in the depths of flowers that are pollinated by hawkmoths...
January 2017: Functional Ecology
https://www.readbyqxmd.com/read/28344355/increased-soil-nutrition-and-decreased-light-intensity-drive-species-loss-after-eight-years-grassland-enclosures
#9
Jingpeng Li, Zhirong Zheng, Hongtao Xie, Nianxi Zhao, Yubao Gao
Enclosures (fenced, grazing or clipping) within a certain period of years are the most common tools for restoration of degraded grasslands in temperate regions. Short-term enclosures can improve biodiversity and productivity by effectively relieving grazing pressure, while long-term enclosures can reduce species diversity. We therefore carried out a field experiment to investigate the specific causes of the reduced species diversity in Hulunbeier grassland of northern China. After eight years of enclosure, the significantly increased soil available nitrogen (AN) and available phosphorus (AvP) in enclosure community reduced nitrogen (N) limitation but most vegetation was still N limited...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28344106/molecular-phylogenetic-relationships-reveal-contrasting-evolutionary-patterns-in-gorgoniidae-octocorallia-in-the-eastern-pacific
#10
M M Soler-Hurtado, P J López-González, A Machordom
The description and delimitation of species in an evolutionary framework is essential for understanding patterns of biodiversity and distribution, and in the assessment of conservation strategies for natural resources. This study seeks to clarify the evolutionary history and genetic variation within and between closely related octocoral species that are fundamental to benthic marine ecosystems for harbouring a high diversity of associated fauna. For our study system, we focused on members of the Gorgoniidae family in the Eastern Pacific, particularly of the Ecuadorian littoral, a less studied marine ecosystem...
March 24, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28343856/contribution-to-the-knowledge-of-pathogenic-fungi-of-spiders-in-argentina-southernmost-record-in-the-world
#11
Romina G Manfrino, Alda González, Jorge Barneche, Julieta Tornesello Galván, Nigel Hywell-Jones, Claudia C López Lastra
The aim of this study was to identify entomopathogenic fungi infecting spiders (Araneae) in a protected area of Buenos Aires province, Argentina. The Araneae species identified was Stenoterommata platensis. The pathogens identified were Lecanicillium aphanocladii Zare & W. Gams, Purpureocillium lilacinum (Thom) Luangsa-ard, Houbraken, Hywel Jones & Samson and Ophiocordyceps caloceroides (Berk & M.A. Curtis). This study constitutes the southernmost records in the world and contributes to expanding the knowledge of the biodiversity of pathogenic fungi of spiders in Argentina...
March 23, 2017: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/28342635/-nature-knows-no-boundaries-the-role-of-nature-conservation-in-peacebuilding
#12
Alexandre Roulin, Mansour Abu Rashid, Baruch Spiegel, Motti Charter, Amélie N Dreiss, Yossi Leshem
Humanity is facing a biodiversity crisis. To solve environmental problems, we bring people from Israel, Jordan, and the Palestinian Authority to the same table. Conservation efforts are beneficial for all communities and facilitate constructive dialog across divides in conflict zones. This pleads for the integration of nature conservation into peacebuilding interventions.
March 22, 2017: Trends in Ecology & Evolution
https://www.readbyqxmd.com/read/28342137/skewed-exposure-to-environmental-antigens-complements-hygiene-hypothesis-in-explaining-the-rise-of-allergy
#13
Wilfried Allaerts, Tse Wen Chang
The Hygiene Hypothesis has been recognized as an important cornerstone to explain the sudden increase in the prevalence of asthma and allergic diseases in modernized culture. The recent epidemic of allergic diseases is in contrast with the gradual implementation of Homo sapiens sapiens to the present-day forms of civilization. This civilization forms a gradual process with cumulative effects on the human immune system, which co-developed with parasitic and commensal Helminths. The clinical manifestation of this epidemic, however, became only visible in the second half of the twentieth century...
March 24, 2017: Acta Biotheoretica
https://www.readbyqxmd.com/read/28341293/marine-protected-communities-against-biological-invasions-a-case-study-from-an-offshore-island
#14
I Gestoso, P Ramalhosa, P Oliveira, J Canning-Clode
Biological invasions are a major threat to the world's biota and are considered a major cause of biodiversity loss. Therefore, world marine policy has recognized the need for more marine protected areas (MPAs) as a major tool for biodiversity conservation. The present work experimentally evaluated how protected communities from an offshore island can face the settlement and/or expansion of nonindigenous species (NIS). First, NIS colonization success in marine protected and marina communities was compared by deploying PVC settling plates at the Garajau MPA and Funchal marina (SW Madeira Island)...
March 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28340453/long-term-nitrogen-deposition-increases-heathland-carbon-sequestration
#15
Chris D Field, Chris D Evans, Nancy B Dise, Jane R Hall, Simon J M Caporn
The large increases in reactive nitrogen (N) deposition in developed countries since the Industrial Revolution have had a marked impact on ecosystem functioning, including declining species richness, shifts in species composition, and increased N leaching. A potential mitigation of these harmful effects is the action of N as a fertiliser, which, through increasing primary productivity (and subsequently, organic matter production), has the potential to increase ecosystem carbon (C) storage. Here we report the response of an upland heath to 10years of experimental N addition...
March 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28340301/ten-years-of-barcoding-at-the-african-centre-for-dna-barcoding
#16
Simeon Bezeng Bezeng, T Jonathan Davies, Barnabas H Daru, Ronny Mukala Kabongo, Olivier Maurin, Kowiyou Yessoufou, Herman van der Bank, Michelle Van der Bank
The African Centre for DNA Barcoding (ACDB) was established in 2005 as part of a global initiative to accurately and rapidly survey biodiversity using short DNA sequences. The mitochondrial cytochrome c oxidase 1 gene (CO1) was rapidly adopted as the de facto barcode for animals. Following the evaluation of several candidate loci for plants, the Plant Working Group of the Consortium for the Barcoding of Life in 2009 recommended that the two plastid genes, rbcLa and matK, be adopted as core DNA barcodes for terrestrial plants...
March 24, 2017: Genome Génome / Conseil National de Recherches Canada
https://www.readbyqxmd.com/read/28339501/mapping-global-biodiversity-connections-with-dna-barcodes-lepidoptera-of-pakistan
#17
Muhammad Ashfaq, Saleem Akhtar, Muhammad Athar Rafi, Shahid Mansoor, Paul D N Hebert
Sequences from the DNA barcode region of the mitochondrial COI gene are an effective tool for specimen identification and for the discovery of new species. The Barcode of Life Data Systems (BOLD) (www.boldsystems.org) currently hosts 4.5 million records from animals which have been assigned to more than 490,000 different Barcode Index Numbers (BINs), which serve as a proxy for species. Because a fourth of these BINs derive from Lepidoptera, BOLD has a strong capability to both identify specimens in this order and to support studies of faunal overlap...
2017: PloS One
https://www.readbyqxmd.com/read/28339473/characterization-of-lignocellulolytic-activities-from-fungi-isolated-from-the-deep-sea-sponge-stelletta-normani
#18
Ramón Alberto Batista-García, Thomas Sutton, Stephen A Jackson, Omar Eduardo Tovar-Herrera, Edgar Balcázar-López, María Del Rayo Sánchez-Carbente, Ayixon Sánchez-Reyes, Alan D W Dobson, Jorge Luis Folch-Mallol
Extreme habitats have usually been regarded as a source of microorganisms that possess robust proteins that help enable them to survive in such harsh conditions. The deep sea can be considered an extreme habitat due to low temperatures (<5°C) and high pressure, however marine sponges survive in these habitats. While bacteria derived from deep-sea marine sponges have been studied, much less information is available on fungal biodiversity associated with these sponges. Following screening of fourteen fungi isolated from the deep-sea sponge Stelletta normani sampled at a depth of 751 metres, three halotolerant strains (TS2, TS11 and TS12) were identified which displayed high CMCase and xylanase activities...
2017: PloS One
https://www.readbyqxmd.com/read/28339464/the-preservation-of-microbial-dna-in-archived-soils-of-various-genetic-types
#19
Ekaterina A Ivanova, Ilia O Korvigo, Boris F Aparin, Evgenii L Chirak, Elizaveta V Pershina, Nikolay S Romaschenko, Nikolai A Provorov, Evgeny E Andronov
This study is a comparative analysis of samples of archived (stored for over 70-90 years) and modern soils of two different genetic types-chernozem and sod-podzolic soils. We revealed a reduction in biodiversity of archived soils relative to their modern state. Particularly, long-term storage in the museum exerted a greater impact on the microbiomes of sod-podzolic soils, while chernozem samples better preserved the native community. Thus, the persistence of microbial DNA in soil is largely determined by the physico-chemical characteristics that differ across soil types...
2017: PloS One
https://www.readbyqxmd.com/read/28339135/integrated-models-to-support-multiobjective-ecological-restoration-decisions
#20
Hannah Fraser, Libby Rumpff, Jian D L Yen, Doug Robinson, Brendan A Wintle
Many objectives motivate ecological restoration including improving vegetation condition, increasing the range and abundance of threatened species, and improving aggregate measures of biodiversity such as richness and diversity. While ecological models have been used to examine the outcomes of ecological restoration, there are few attempts to develop models to account for multiple, potentially competing objectives. We develop the first predictive model that integrates a vegetation-focused state-and-transition model with species distribution models for birds...
March 24, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
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