Top 10 Biorxiv Papers Today in Ecology


2.029 Mikeys
#1. Plant respiration: controlled by photosynthesis or biomass?
Alessio Collalti, Mark Tjoelker, Guenther Hoch, Annikki Makela, Gabriele Guidolotti, Mary Heskel, Giai Petit, Michael Ryan, Giorgio Matteucci, Giovanna Battipaglia, I. Colin Prentice
Two simplifying hypotheses have been proposed for whole-plant respiration. One links respiration to photosynthesis; the other to biomass. Using a first-principles carbon balance model with a prescribed live woody biomass turnover, we show that if turnover is fast, the accumulation of respiring biomass is low and respiration depends primarily on photosynthesis; while if turnover is slow, the accumulation of respiring biomass is high and respiration depends primarily on biomass. But the first scenario is inconsistent with evidence for substantial carryover of fixed carbon between years, while the second implies far too great an increase in respiration during stand development, leading to depleted carbohydrate reserves and an unrealistically high mortality risk. These two mutually incompatible hypotheses are thus both incorrect. Respiration is not linearly related either to photosynthesis or to biomass, but rather it is more strongly controlled by recent photosynthates (and reserve availability) than by total biomass.
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biorxivpreprint: Plant respiration: controlled by photosynthesis or biomass? https://t.co/qZuBdILxSz #bioRxiv
biorxiv_ecology: Plant respiration: controlled by photosynthesis or biomass? https://t.co/bBfcvlT7HP #biorxiv_ecology
GioMatLTER: RT @biorxiv_ecology: Plant respiration: controlled by photosynthesis or biomass? https://t.co/bBfcvlT7HP #biorxiv_ecology
geoxiyang: RT @biorxiv_ecology: Plant respiration: controlled by photosynthesis or biomass? https://t.co/bBfcvlT7HP #biorxiv_ecology
ale_collalti: RT @biorxiv_ecology: Plant respiration: controlled by photosynthesis or biomass? https://t.co/bBfcvlT7HP #biorxiv_ecology
ale_collalti: RT @biorxivpreprint: Plant respiration: controlled by photosynthesis or biomass? https://t.co/qZuBdILxSz #bioRxiv
zhenbin_hu: RT @biorxivpreprint: Plant respiration: controlled by photosynthesis or biomass? https://t.co/qZuBdILxSz #bioRxiv
elisagrieco80: RT @biorxiv_ecology: Plant respiration: controlled by photosynthesis or biomass? https://t.co/bBfcvlT7HP #biorxiv_ecology
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Authors: 11
Total Words: 13149
Unqiue Words: 4465

2.006 Mikeys
#2. Functional community assembly and turnover along elevation and latitude
Marta A Jarzyna, Ignacio Quintero, Walter Jetz
The drivers of community coexistence are known to vary with environment, but their consistency across latitudes and scales, and resulting conservation implications, remain little understood. Here, we combine functional and phylogenetic evidence along elevations to document strong biotic constraints on coexistence in avian communities in both benign (tropical low elevations) and severely harsh (temperate/polar highlands) environments. Assemblages in both are marked by high assemblage functional uniqueness, whereas in tropical highlands and temperate/polar low elevations there is strong functionally redundancy and pronounced environmental constraints. Only in harsh environments is phylogeny an effective surrogate for functional assemblage structure, reflecting nuanced shifts in the position, shape, and composition of measured multivariate trait space along gradients. Independent of scale and latitude, high elevation assemblages emerge as exceptionally susceptible to functional change.
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DiogoProvete: RT @biorxiv_ecology: Functional community assembly and turnover along elevation and latitude https://t.co/N5aZoywSCJ #biorxiv_ecology
andrepazv: RT @biorxivpreprint: Functional community assembly and turnover along elevation and latitude https://t.co/fwP2Cx6AKj #bioRxiv
Mtok_Snsk: RT @biorxiv_ecology: Functional community assembly and turnover along elevation and latitude https://t.co/N5aZoywSCJ #biorxiv_ecology
IgnacioQM: RT @biorxivpreprint: Functional community assembly and turnover along elevation and latitude https://t.co/fwP2Cx6AKj #bioRxiv
mauriciovancine: RT @biorxiv_ecology: Functional community assembly and turnover along elevation and latitude https://t.co/N5aZoywSCJ #biorxiv_ecology
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Authors: 3
Total Words: 7989
Unqiue Words: 2769

1.998 Mikeys
#3. Diatoms structure the plankton community based on selective segregation in the world's ocean
Flora Julie Vincent, Chris Bowler
Diatoms are a major component of phytoplankton, believed to be responsible for around 20% of the annual primary production on Earth. As abundant and ubiquitous organisms, they are known to establish biotic interactions with many other members of the plankton. Through analysis of co-occurrence networks derived from the Tara Oceans expedition that take into account the importance of both biotic and abiotic factors in shaping the spatial distributions of species, we show that only 13% of diatom pairwise associations are driven by environmental conditions, whereas the vast majority are independent of abiotic factors. In contrast to most other plankton groups, at a global scale diatoms display a much higher proportion of negative correlations with other organisms, particularly towards potential predators and parasites, suggesting that their biogeography is constrained by top down pressure. Genus level analyses indicate that abundant diatoms are not necessarily the most connected, and that species-specific abundance distribution...
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1.998 Mikeys
#4. How indirect interactions shape long-term invasion dynamics in complex ecological communities
Jean-Francois Arnoldi, Matthieu Barbier, Ruth Kelly, Andrew L Jackson
Many facets of ecological theory rely on the analysis of invasion processes, and general approaches exist to understand a species' short-term ability to invade a community. However, predicting the long-term transformations of communities following an invasion remains --even in theory-- a challenging endeavour. We propose a simple method to predict these impacts, as a function of community structure and invader dynamical characteristics, applicable to a vast class of dynamical models. Our approach reveals that short-term invasion success and long-term consequences are two independent axes of variation controlled by different properties of both invader and resident community. Whether a species can invade or not is controlled by its invasion fitness, which depends on environmental conditions and direct interactions between the invader and other species. But, whether this invasion will cause extinctions, or a even regime shift, depends on a specific measure of indirect interaction feedbacks that may involve the entire resident...
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biorxivpreprint: How indirect interactions shape long-term invasion dynamics in complex ecological communities https://t.co/P70HZoacCe #bioRxiv
biorxiv_ecology: How indirect interactions shape long-term invasion dynamics in complex ecological communities https://t.co/B9jJ6oV9fI #biorxiv_ecology
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Authors: 4
Total Words: 12442
Unqiue Words: 2918

1.997 Mikeys
#5. Evolved for success in novel environments: the round goby genome
Irene Adrian-Kalchhauser, Anders Blomberg, Tomas Larsson, Zuzana Musliova, Claire R Peart, Martin Pippel, Monica Hongroe Solbakken, Jaanus Suurvaeli, Jean-Claude Walser, Joanna Yvonne Wilson, Magnus Alm Rosenblad, Demain Burguera, Silvia Gutnik, Nico Michiels, Mats Toelpel, Kirill Pankov, Siegfried Schloissnig, Sylke Winkler
Since the beginning of global trade, hundreds of species have colonized territories outside of their native range. Some of these species proliferate at the expense of native ecosystems, i.e., have become invasive. Invasive species constitute powerful in situ experimental systems to study fast adaptation and directional selection on short ecological timescales. They also present promising case studies for ecological and evolutionary success in novel environments. We seize this unique opportunity to study genomic substrates for ecological success and adaptability to novel environments in a vertebrate. We report a highly contiguous long-read based genome assembly for the most successful temperate invasive fish, the benthic round goby (Neogobius melanostomus), and analyse gene families that may promote its impressive ecological success. Our approach provides novel insights from the large evolutionary scale to the small species-specific scale. We describe expansions in specific cytochrome P450 enzymes, a remarkably diverse innate...
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RicciardiLab: RT @biorxiv_ecology: Evolved for success in novel environments: the round goby genome https://t.co/2JSDc4ZSZv #biorxiv_ecology
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Sample Sizes : [10, 13, 20, 42]
Authors: 18
Total Words: 25784
Unqiue Words: 8613

1.996 Mikeys
#6. Modeling the control of bacterial infections via antibiotic-induced proviruses
Sara Clifton, Ted Kim, Jayadevi H Chandrashekhar, George A O'Toole, Zoi Rapti, Rachel J Whitaker
Most bacteria and archaea are infected by latent viruses that change their physiology and responses to environmental stress. We use a population model of the bacteria-phage relationship to examine the role that latent phage play on the bacterial population over time in response to antibiotic treatment. We demonstrate that the stress induced by antibiotic administration, even if bacteria are resistant to killing by antibiotics, is sufficient to control the infection under certain conditions. This work expands the breadth of understanding of phage-antibiotic synergy to include both temperate and chronic viruses persisting in their latent form in bacterial populations.
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Authors: 6
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1.996 Mikeys
#7. Greater capacity to exploit warming temperatures in northern populations of European beech is partly driven by delayed leaf senescence
Homero Garate-Escamilla, Craig C. Brelsford, Arndt Hampe, T. Matthew Robson, Marta Benito Garzon
One of the most widespread consequences of climate change is the disruption of trees phenological cycles. The extent to which tree phenology varies with local climate is largely genetically determined, and while a combination of temperature and photoperiodic cues are typically found to trigger bud burst (BB) in spring, it has proven harder to identify the main cues driving leaf senescence (LS) in autumn. We used 925 individual field-observations of BB and LS from six Fagus sylvatica provenances, covering the range of environmental conditions found across the species distribution, to: (i) estimate the dates of BB and LS of these provenances; (ii) assess the main drivers of LS; and (iii) predict the likely variation in the growing season length (GSL; defined by BB and LS timing) across populations under current and future climate scenarios. To this end, we first calibrated linear mixed-effects models for LS as a function of temperature, insolation and BB date. Secondly, we calculated the GSL for each provenance as the number of days...
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Authors: 5
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1.996 Mikeys
#8. Societal attention toward extinction threats
Ivan Jaric, Celine Bellard, Franck Courchamp, Gregor Kalinkat, Yves Meinard, David L. Roberts, Ricardo A. Correia
Public attention and interest in the fate of endangered species is a crucial prerequisite for effective conservation programs. Societal awareness and values will largely determine whether conservation initiatives receive necessary support and lead to adequate policy change. Using text data mining, we assessed general public attention toward climate change and biological invasions, which represent two key threats for endangered amphibian, reptile, bird and mammal species in three European countries (France, Germany and the United Kingdom). Our analysis revealed that public attention patterns differed among species groups and countries but was globally higher for climate change than for biological invasions. Both threats received better recognition in threatened than in non-threatened species, as well as in native species than in species from other countries and regions. The relative level of attention toward the two threats corresponded well with the listing of the threats and their severity within the IUCN Red List. We conclude...
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Authors: 7
Total Words: 7309
Unqiue Words: 2352

1.99 Mikeys
#9. Ecological association between seagrass and mangrove ecosystems increases seagrass population longevity in island ecosystem
Amrit Kumar Mishra, Deepak Apte
We report for first time about tropical seagrass meadows association with mangrove ecosystems and its effect on seagrass population dynamics off India in Andaman Sea. Two sites of Neil island, i.e. site 1, associated with mangroves and site 2 without mangroves were selected. Quadrat sampling (n=5) were used to collect sediment and seagrass samples. Reconstruction techniques were used to derive population age structure. T. hemprichii population was found mostly with sandy substrate at both sites, with silt consisting very low fraction at site 1. Density, biomass, productivity and morphometric features of T. hemprichii were significantly higher at site 1. Reproductive density was higher at site 1, whereas reproductive effort to produce fruits were higher at site 2. The rhizome (vertical + horizontal) production rates were higher at site 1 and the vertical elongation rate was higher at site 2. Plastochrome interval for site 1 and 2 were 25.49 and 26.80 days respectively leading to formation of 14.31 and 13.62 leaves per year. T....
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1.989 Mikeys
#10. How Sampling-Based Overdispersion Undermines India's Tiger Monitoring Orthodoxy
Arjun Gopalaswamy, Ullas Karanth, Mohan Delampady, Nils Stenseth
Conservation agencies entrusted with recovery of iconic mammals may exaggerate population trends without adequate scientific evidence. Recently, such populations were termed as "political populations" in the conservation literature. We surmise that political populations emerge when agencies are pressured to report abundances at large spatial scales for species that are difficult to survey. Indian tiger conservation agencies use an experimental approach called double-sampling using index-calibration models. A recent, mathematical, study demonstrated the unreliability of this approach in the context of India's tigers. Yet, this approach continues to be applied and even promoted by global tiger conservation agencies in other tiger range countries. In this article, we aim to: (1) discuss the ecological oddities emerging from results of India's national tiger surveys, (2) demystify the mathematics underlying the problems of this survey methodology and (3) confront these findings with results from India's recent national tiger survey of...
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