Methodology matters for comparing coarse wood and bark decay rates across tree species

Post provided by Chenhui Chang

 

落红不是无情物,化作春泥更护花。 –龚自珍(清)
The fallen petals are not as cruel as they seem; they fertilize those in full bloom instead.”Gong Zizhen (Qing Dynasty)

log
A decaying Douglas fir log

This picture shows a decomposing log of Douglas fir, Pseudotsuga menziesii (Mirb.) Franco, in Schovenhorst, The Netherlands, which is one of the deadwood incubation sites of the LOGLIFE “tree cemetery” project. 25 angiosperm and gymnosperm species covering a diverse range of functional traits were selected and incubated in the “common garden experiment”. This project was founded in 2012, aiming to disentangle the effects of different species’ wood traits and site-related environmental drivers on decomposition dynamics of wood, and its associated diversity of microbial and invertebrate communities.

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The tripod frame: mooring acoustic receivers on the seabed

Post provided by Jolien Goossens

Jolien Goossens tells us about the challenges of installing acoustic receivers on the seabed and the tripod they designed to overcome them.

sea

Installing scientific instruments in the marine environment comes with many challenges. Equipment has to withstand the physical forces of tides, currents and storms. Researchers have to take into account the effects of biofouling, corrosion and human activities. Even access to the study site can pose its difficulties, as diving is limited by depth and weather conditions. Practical deployment mechanisms are therefore needed to sustain consistent data flows.

Acoustic telemetry enables the observation of animal movements in aquatic environments. Individual animals are fitted with a transmitter, relaying a signal that can be picked up by acoustic receivers. To facilitate a convenient installation of these instruments, we developed and tested a new design, mounting a receiver with an acoustic release on a tripod frame. This frame enables the recovery of all equipment and better yet, improves the quality of the data.

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Neo was right—The Matrix explains everything

Post provided by Jody Reimer

One of the unifying themes in ecology may be the acknowledgement that we live in a world of finite resources, and so we also live in a world of tradeoffs. A diverse range of research questions can be distilled into a question about tradeoffs. For example, how should an animal forage in the presence of predation? Which selective forces determine the life history of a flowering perennial? How should we manage a population to maximize the sustainable harvest rate?

Jody

Questions as varied as these can all be addressed using the same method of stochastic programming[1] (SDP) (see McNamara and Houston, 1986; Rees et al. 1999; and Runge and Johnson, 2002, respectively). SDP has been used extensively to study optimal tradeoffs in a wide range of applications in ecology, evolutionary biology, and management. It is a flexible and powerful modelling framework that allows for simultaneous consideration of an individual’s state, how an optimal decision might explicitly depend on time, and for a probabilistic landscape of risks and rewards. 

[1] Also known as Markov Decision Processes

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Issue 11.6: goats, camera traps, coral imaging and more!

The June issue of Methods is now online!

June Cover

This month’s issue features articles on designing camera trap studies, measuring coral growth rates, quantifying carbon assimilation by marine calcifiers and much more.

Senior Editor Rob Freckleton has selected six featured articles this month – find out about them below. We’ve also got three Applications and a Practical Tools article which are freely available to everyone – no subscription required!

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Issue 11.5: Our May issue is now online!

The May issue of Methods is now online! As well as four Application and two Practical Tools articles, the latest issue of Methods in Ecology and Evolution includes six Featured Articles handpicked by our editors – you can find out more about them below.     Featured Articles Tree-based inference of species interaction networks from abundance data To be relevant, any network inference methodology needs … Continue reading Issue 11.5: Our May issue is now online!

Latest issue and other articles

Issue 3.4 Our latest issue covers an impressive array of subjects: from metabarcoding (with associated presentation), to population genetics and population monitoring (with video explaining a microphone array system). Modelling and monitoring dispersal also features heavily with four articles, one of which is accompanied by a video for a novel telemetry system to track wild animals. Articles also include topics such as transient dynamics, a review … Continue reading Latest issue and other articles

New MEE article featured in Faculty of 1000

Another of our recent articles, Assessing transferability of ecological models: an underappreciated aspect of statistical validation, by Seth Wenger and Julian Olden, has recently been highlighted on Faculty of 1000. F1000 is a platform providing post-publication peer-review and selecting only the most important articles in biology and medicine. Just 2% of published articles are highlighted on Faculty of 1000 each month. Ben Bolker and Michael … Continue reading New MEE article featured in Faculty of 1000

Methods in the press

Two articles have been recently highlighted in the press. Iain Stott, Dave Hodgson and Stuart Townley, University of Exeter, have developed Popdemo, a new software tool for helping prioritise efforts in species conservation. As well as determining which species need our help, it will also be useful in pest control and sustainable harvesting. The University press release was picked up by a variety of websites, … Continue reading Methods in the press

Issue 3.3

About the issue Issue 3.3 contains an amazing number of extra features: three videos, one podcast and one Powerpoint presentation. The topics in the issue range from DNA barcoding, surveys, measuring diversity, population and movement modelling and includes five free applications. About the cover Recently developed light-weighed tracking devices for positioning through light intensity pattern (‘geolocation’) have begun to greatly improve our knowledge of animal … Continue reading Issue 3.3

Recent content and new video

Lots of exciting content has recently gone online. Firstly, two interesting new applications (as always free): simapse, simulation maps for ecological niche modelling in Python and nadiv, an R package for estimating non-additive genetic variances in animal models. Also, two research articles. In the first, Julien Beguin and colleagues introduce an alternative procedure for fitting Bayesian hierarchical spatial models (BHSM) with quite general spatial covariance … Continue reading Recent content and new video