Definitions of Native Species

Native Tree Species:

The UK Native trees definition is given by The Woodland trust (woodlandtrust.org.uk). The term native is used for any species that has made its way to the UK naturally, not intentionally or accidentally introduced by humans. In terms of trees and plants, these are species that recolonised the land when the glaciers melted after the last ice age and before the UK was disconnected from mainland Europe.

During the ice age itself, areas of the UK were completely covered by a huge ice sheet. This prevented many trees and plants from growing and many species retreated south to survive the freeze. The ice sheets that covered large areas of the planet locked up lots of water from the Earth’s system. This made sea levels much lower than today and exposed a strip of land (now submerged beneath the Channel Sea) that connected the UK to mainland Europe.

As the Earth warmed and ice began to melt and retreat (over 10,000 years ago), species began to recolonise the once frozen land from the warmer south. However, trapped water released back into the system from the melting ice caused sea levels to rise again. Gradually the rising sea flooded the land bridge from the UK to Europe and prevented any more species (unless they could fly) from colonising the UK.

Non-native Tree Species:
Any species that has been brought to the UK by humans is non-native. This means species which were not naturalised here if it were not for humans intentionally or accidentally bringing them to UK.
About 8,000 years ago, Neolithic man first arrived in Britain and brought new species, such as plant crops and livestock, and a few stowaways like the house mouse.There are many non-native species living in the UK. Some, like Douglas fir and Sitka spruce, are used in forestry; and others, such as copper beech and London plane, were brought here for their beauty.

British tree pages feature​ some of the most common non-native trees that have naturalised in the ​the landscape.

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The triangular seed mass-leaf area relationship holds for annual plants and is determined by habitat productivity

Functional Ecology - plain language summaries

Bianca A Santini, John G Hodgson, Ken Thompson, Peter J Wilson, Stuart R Band, Glynis Jones, Mike Charles, Amy Bogaard, Carol Palmer & Mark Rees

The relationships between plant traits tells us about the amount of resources species invest on a given trait. For example, thicker leaves are long-lived, but their construction is expensive for the plant and have lower photosynthetic rates than thin leaves. Another example, related to our study, is the triangular relationship found between seed mass and leaf area in woody species. This relationship tells us that small-seeded species can have either small or large leaves, whereas big-seeded species have large leaves. However, the combination of big seeds with small leaves does not occur. Again, this give us insights into resource allocation, in this case of the photosythates in a leaf and how are they distributed, either into small seeds or big seeds.

Indeed, resource allocation changes…

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Journal ranks 2015

ConservationBytes.com

graduate_barsBack in February I wrote about our new bibliometric paper describing a new way to rank journals, which I still contend is a fairer representation of relative citation-based rankings. Given that the technique requires ISI, Google Scholar and Scopus data to calculate the composite ranks, I had to wait for the last straggler (Google) to publish the 2015 values before I could present this year’s rankings to you. Google has finally done that.

So in what has become a bit of an annual tradition, I’m publishing the ranks of a mixed list of ecology, conservation and multidisciplinary disciplines that probably cover most of the journals you might be interested in comparing. Like for last year, I make no claims that this list is comprehensive or representative. For previous lists based on ISI Impact Factors (except 2014), see the following links (2008, 2009, 2010, 2011, 2012, 

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International Women’s Day 2016

International Women’s Day is celebrated every year on 8th March.  A lot of work is needed, more than one billion people still remain hungry today, in addition millions of women and children are malnourished.The vast reservoir of nature`s biological wealth can provide for all and it needs to accord reognition to women and their silent contributions in conserving,saving, maintaining genes and life in diverse ecosystems and towards sustainable development.I wish and hope  scientific advances can address this issue. The current deliberations of Food and Agriculture Organisation; Biodiversity International;Future Earth;International Platform for Biodiversity and Ecosystem Services;Biodiversity Monitoring Assessments  will take note of this important issue through  their  scientific programme developments.
Promila Kapoor-Vijay

https://canwefeedtheworld.wordpress.com/2016/03/08/international-womens-day-2016/

http://www.internationalwomensday.com