The fossil cast of the
dinosaur Rhomaleosaurus cramptoni provided an interesting
backdrop and contrast of scale as we set up for our workshop on
‘Bryophyte Ecology’ which was attended by 20 Bath Nats members
and visitors.
For this workshop we
started with the premise that different habitats can (to some extent)
be home to predictable suites of moss and liverwort species and that
this can help greatly when learning to identify these intriguing
plants. So we had set out mini study stations representing 7 common
local habitats such as trees, mortared walls, dry stone walls,
limestone grassland, woodland banks, soil and tarmac. Each habitat
station was equipped with species descriptions, photographs and of
course fresh material of the key species for each habitat. Armed with
LED hand lenses everyone was invited to have a go at identifying the
species for one habitat before moving on to another.
Many mosses and
liverworts were examined, from huge clumps of Rambling Tail Moss
(Anomodon viticulosus) found on dry stone walls, to small
leafy liverworts such as Dilated Scalewort (Frullania dilatata) on
tree bark.
As expected the ‘big
two’ ubiquitous species Common Feather-moss (Kindbergia
praelonga) and Rough-stalked Feather-moss (Brachythecium
rutabulum) proved tricky to recognise but examination of tiny
details with a hand lens helped separate these confusing species.
The gemmae cups of thallose liverworts on soil provided some
interesting insights into vegetative reproduction in liverworts.
Two hours passed very
quickly as intense and sociable study ensued, and hopefully most
people will now be able to identify Springy Turf-moss
(Rhytidiadelphus squarrosus) and Pointed Spear-moss
(Calliergonella cuspidata) in their lawns.
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