Having grown up in West Wales, and knowing the proposed transect for my research well (albeit from fleeting glances), it became clear to me that if I were to properly record data for the ferns in question I would need to divide the transect into its variety of visible ecosystems. Some of these were fairly standard (e.g. woodland, grassland, coastal), however during my initial investigations it became clear that there were indeed anomalies in the presence or absence of both Dryopteris and Pteridium. Most presence was expected, nevertheless I set about dividing the transect into a series of eight zones according to my own perception of the landscape, and my explorations therein further informed the tangent of my research and its development. Possibly not an accepted means of recording on an ecological basis! This transect essentially follows a public footpath. The map above delineates my selected zones, and a description of each is as follows:
Adjacent to the disused waterwheel at Llwyn-ysgaw. Principally boggy wetland, dominated by wild celery but with D. filix-mas present in areas close to the dry stone wall adjacent to the waterwheel and the remains of the wall nearby, and nearer the stream bed prior to it breaking into an area of more open marsh.
A culvert runs beneath the road from Zone 1 into Zone 2, thus channelling a stream into this zone of young woodland. Woodland species proliferate however D. filix-mas dominates, particularly in areas adjacent to the stream.
The stream runs adjacent to an old hedgerow, adjacent to arable land. Shaded yet also open. Very little evidence of pteridophytes here, three of four specimens of D. filix-mas close to the hedgerow and stream to the southerly point of the zone.
An interesting zone and possibly slightly overlooked due to its difficulties. Stream runs into open arable land within a deep ditch therefore semi-cultivated. Pteridium evident for the first time on the transect, in very close quarters to both the cultivated land and the stream. D. filix-mas present streamside mainly upon the westerly facing bank. This zone then runs into a deep valley, but recordings are maintained around the footpath area above this as the valley is inaccessible without assistance. However other Dryopteris species are noted as becoming increasingly prevalent, even if it is not possible to obtain recordings from them.
Here the footpath drops into the valley, and into what appears to be young woodland, however given the vagaries of the West Wales climate may simply be wind and weather worn trees. However here it becomes apparent that there are stands of Dryopteris dilatata, with occasional D. affinis and some evidence of D. filix-mas, particularly near the stream. Some epiphytic growth present.
In which the footpath wends its way up out of the valley and into open grasslands, with the stream and valley continuing to the north of the transect, before the stream outpours into the sea (inaccessible). Vast stands of P. aquilinum here, and visible across the entirety of the valley. Some instances of D. filix-mas, but diminutive in form.
Almost purely coastal, clifftops and associated vegetation. A vast stand of P. aquilinum near the cliff (and the headland of Penpeles), possibly some young bracken sporophytes within open grassland (but given the deep run of their rhizomes it is hard to be sure).
A different stream runs into this zone and then down into the sea. An interesting area. P. aquilinum occurs sporadically hugging the near-land coastline. D. filix-mas however appears closer to the rocky clifftops and shore, again in somewhat diminutive form but evidently thriving. Noted from within this rocky bay, a wall of presumed Dryopteris of unknown speciation, and very much inaccessible. Not part of this research maybe but it raises the question of salinity tolerance in that which is predominantly a woodland species?