[Tagging] wetland=bog, why only "receive their water and nutrients from rainfall"?
chris_hormann at gmx.de
Sun Jan 24 20:50:46 UTC 2016
On Sunday 24 January 2016, Andy Townsend wrote:
> What does "fen" means to you?
> I've a fairly good idea what I think it means, and I'd never or
> almost never tag it as a natural feature (though it may have a name,
> and the natural features within it may have names).
As a non-native English speaker i do not have a genuine understanding of
the word fen but in terms of wetland types i consider fens peat
producing wetlands with lower acidity and higher levels of nutrients
and therefore hosting more diverse plant communities than bogs. There
are boundary cases of course.
> Could you come up with some examples of things that are currently
> tagged as bogs but shouldn't be, or aren't tagged as fens but should
> be (in the UK and Ireland would be helpful to me, as that's what I'm
> going to be most familiar with, but obviously other places will be
> helpful to other people).
For the UK/Ireland this is difficult without local knowledge. Due to
the climate and geology blanket bogs are very widespread there and the
presence of a stream in the area for example does not necessarily mean
it feeds the wetland - it can still be primarily fed by rainfall.
Here in Germany with a drier, more continental climate you can pretty
much rule out any wetland at the shore of a larger lake or next to a
larger river to be a bog. Like:
And if you look at
you can also see bogs mapped in regions (like Tunesia) where climate
would not allow the formation of bogs.
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