Monthly Archives: February 2018

Plant-pollinator networks in the tropics: a new review just published.

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As an ecologist who has carried out field work in the temperate zone (UK), the subtropics (Tenerife and South Africa) and the tropics (parts of South America, Africa and Australia)  I’ve always found the idea that the study of ecology can be divided into “tropical” and “non-tropical” a bit odd.  It’s as if the way that the natural world works somehow changes at about 23 degrees north or south of the equator, making things “different” around the equator.  The tropics are a very special, diverse place, it’s true, but so are many places outside the tropics.

With this in mind I was pleased when I was asked by some of my Brazilian colleagues to contribute to a chapter in a new book entitled Ecological Networks in the Tropics. It was an opportunity to review what is known about plant-pollinator networks in the tropics and the ways in which they are very similar to such networks at lower latitudes. Here’s the details of the chapter, followed by the abstract.  If anyone wants a copy please drop me an email:

Vizentin-Bugoni J, PKM Maruyama, CS Souza, J Ollerton, AR Rech, M Sazima. (2018) Plant-pollinator networks in the tropics: a review. pp 73-91 In Dáttilo W & V. Rico-Gray. Ecological networks in the Tropics. Springer.

Abstract:

Most tropical plants rely on animals for pollination, thus engaging in complex interaction networks. Here, we present a global overview of pollination networks and point out research gaps and emerging differences between tropical and non-tropical areas. Our review highlights an uneven global distribution of studies biased towards non-tropical areas. Moreover, within the tropics, there is a bias towards the Neotropical region where partial networks represent 70.1% of the published studies. Additionally, most networks sampled so far (95.6%) were assembled by inferring interactions by surveying plants (a phytocentric approach). These biases may limit accurate global comparisons of the structure and dynamics of tropical and non-tropical pollination networks. Noteworthy differences of tropical networks (in comparison to the non-tropical ones) include higher species richness which, in turn, promotes lower connectance but higher modularity due to both the higher diversity as well as the integration of more vertebrate pollinators. These interaction patterns are influenced by several ecological, evolutionary, and historical processes, and also sampling artifacts. We propose a neutral–niche continuum model for interactions in pollination systems. This is, arguably, supported by evidence that a high diversity of functional traits promotes greater importance of niche-based processes (i.e., forbidden links caused by morphological mismatching and phenological non-overlap) in determining which interactions occur, rather than random chance of encounter based on abundances (neutrality). We conclude by discussing the possible existence and direction of a latitudinal gradient of specialization in pollination networks.

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Filed under Bees, Biodiversity, Biogeography, Macroecology, Mutualism, Pollination

XI International Symposium on Pollination, Berlin, April 16th -20th, 2018

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From the organisers:

Dear Pollination Biologists,

The International Commission for Pollinator-Plant Relationships (ICPPR) invites you to attend, and possibly submit abstracts for. the XI International Symposium on Pollination TO BE HELD IN BERLIN, GERMANY, APRIL 16-20 2018.

Please take advantage of the early-bird registration opportunity.

The deadline for Abstract submissions is MARCH 1ST, 2018

MORE DETAILS AT:

http://www.icppr.com/xi-international-symposium-on-pollination.html

I HOPE TO SEE YOU IN BERLIN!

Carlos H. Vergara

CHAIR OF THE ORGANIZING COMMITTEE

 

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Filed under Bees, Biodiversity, Ecosystem services, Honey bees, Pollination

Metaphors in oak: my Images of Research entry for 2018

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The Annual University of Northampton “Images of Research” competition has been running for 5 years and this year’s event has seen a bumper entry of 38 images with accompanying text in fewer than 150 words (including one from our Vice Chancellor).

I think that I’ve entered an image every year – this is from 2016 – and you can see my entry from this year above.  It’s called “Metaphors in oak” and here’s my 150 words – perhaps a little fanciful in retrospect, but it’s what the photo said to me at the time:

“This photograph was taken on a recent field trip to Cannock Chase in Staffordshire. I was drawn to the colours and textures of this fallen oak branch as a piece of natural art, but also to its ecological significance. The bark has been attacked by insects then decomposed by fungi and bacteria, leaving behind the wooden core of the branch, which has subsequently been colonised by lichens and mosses. Decay, recycling, colonisation, biodiversity: fundamental ecological patterns and processes. But, with a little imagination, there are also metaphors for research to be seen in this picture. The growth patterns of the wood seem to flow, and in it we can envision a journey of both smooth waters and turbulent times. The diversity of organisms captured in the image reminds us of the varied experiences we can expect during research, not all positive, but all adding to the colour and texture of our lives. What does this image say, and what metaphors does it reveal, to you?”

 

Here’s a link to the exhibition catalogue and to the online voting system – well worth browsing through to see the range and diversity of research being carried out at our university.

 

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Filed under Biodiversity, University of Northampton