Sankurie Pye - Academia.edu (original) (raw)

Papers by Sankurie Pye

Research paper thumbnail of The effects of dispersal mode on the spatial distribution patterns of intertidal molluscs

Journal of Animal Ecology, 2001

Summary 1. As many species of marine benthic invertebrates have a limited capacity for movement a... more Summary 1. As many species of marine benthic invertebrates have a limited capacity for movement as adults, dispersal mode is often considered as a determinant of geographical ranges, genetic structure and evolutionary history. Species that reproduce without a larval stage can only disperse by floating or rafting. It is proposed that the colonization processes associated with such direct developing species

Research paper thumbnail of Request for specimens of specialist species of salinelagoons in the British Isles

Research paper thumbnail of Uist Lagoons Survey

Scotland has around a hundred saline lagoons, coastal lochs that are not quite as saline as the s... more Scotland has around a hundred saline lagoons, coastal lochs that are not quite as saline as the sea. A small number of organisms are confined to these lochs, but most of these are very small and belong to groups that are difficult to identify. A consortium of specialists in identification at the National Museum of Scotland and ecologists sampled most of the saline lagoons on designated sites (SSSI and SAC) in the Uists, the area believed to have the best biodiversity of lagoon organisms in Scotland. The study not only confirmed the presence of these specialist species, but also that they were more widely distributed in the Uists than had been believed. Samples of the organisms have been placed in the permanent collections of the National Museum of Scotland and (for plants) in the Royal Botanic Gardens Edinburgh, where they will be available for future study.

Research paper thumbnail of Hydrobiidae on North Uist

One of the problems of working on lochs that are slightly saline is a group of tiny (1-4mm) mollu... more One of the problems of working on lochs that are slightly saline is a group of tiny (1-4mm) molluscs called mudsnails (Hydrobiidae). The rarest of these, Hydrobia acuta neglecta, was first identified in the UK in the Uists. This project aimed to eliminate any doubt about the identity. Genetic analyses funded by SNH and conducted by scientists at the National Museum of Scotland and Heriot-Watt University confirmed that there were healthy populations of this snail in three lochs in North Uist.

Research paper thumbnail of Morphological and molecular identification of Hydrobiidae from brackish lagoons in Scotland

The following paper presents the results on the determination of the diversity of species from th... more The following paper presents the results on the determination of the diversity of species from the Phytophthora genus occurring in the declining oak stands in Krotoszyn Plateau in Poland. From the 50s of the last century, significant deterioration of oak health was observed in these stands, and Phytophthora species were suggested as one of the factors of the decline. In order to determine the presence of pathogenic organisms from the Phytophthora genus in these stands, 180 rhizosphere soil samples from three forest districts throughout the Krotoszyn Plateau were collected and subjected to the isolation method. Phytophthora species were consistently isolated from all the sampled stands, and 194 isolates from 111 positive samples were obtained. However, 150 (77%) and 44 (23%) isolates originated from the samples taken under the symptomatic and asymptomatic trees, respectively. All the obtained isolates were morphologically classified using the light and scanning electron microscopy and divided into morphological groups. Genomic DNA was isolated from selected isolates representing each group, ITS regions were amplified and sequence analyses were performed. In total, four different Phytophthora species were detected, including P. cactorum, P. plurivora, 204

Research paper thumbnail of 2016 site condition monitoring of the rocky reefs and sea caves of Mousa SAC and survey of sedimentary habitats of the Mousa to Boddam MPA

Research paper thumbnail of The biodiversity of saline lagoons in the Uists with notes on the morphological and molecular identification of Hydrobiidae

Research paper thumbnail of Hydrobiidae of North Uist

Research paper thumbnail of A long-finned specimen of Beryx decadactylus caught in the North-eastern Atlantic of Rockall

Journal of Fish Biology, 1999

A long-finned specimen of Beryx decadactylus from off Rockall is reported and the Northeastern At... more A long-finned specimen of Beryx decadactylus from off Rockall is reported and the Northeastern Atlantic persistence of juvenile characters in subadult and adult fish is discussed.

Research paper thumbnail of Dispersal mode and assessments of recovery on the shores of Gruinard, the ‘anthrax island’

Biodiversity and Conservation, 2008

Formaldehyde runoff was an unintended impact of the anthrax decontamination procedure on the isla... more Formaldehyde runoff was an unintended impact of the anthrax decontamination procedure on the island of Gruinard. The death of intertidal organisms was observed where formaldehyde reached the shore during 1986. The extent to which shores on Gruinard have recovered was assessed with survey work in 2000. Recovery estimates were based on the hypothesis that the process of recolonization is partly dependent on species' dispersal capability. Underdevelopment of the assemblage of species lacking planktonic dispersal stages (direct developers) is therefore evidence that the process of recolonization is ongoing, rather than complete. A novel multivariate test showed that, when comparing quadrats from Gruinard and nearby mainland shores, assemblages of direct developing molluscs were significantly more distinct than assemblages of molluscs with planktonic dispersal stages. The average densities of species with direct development were generally lower on Gruinard than on mainland shores. While some species with direct development have similar densities on Gruinard and on the surrounding shores, the recovery of the overall assemblage was still incomplete after 14 years. In contrast, the harvested species, Littorina littorea, appeared to benefit from the absence of humans visiting Gruinard's shores. Populations of L. littorea on Gruinard contained significantly higher proportions of large individuals. Depending on the dispersal capabilities of different species, Gruinard is either still in recovery or acts as a reserve.

Research paper thumbnail of Dispersal mode and assessments of recovery on the shores of Gruinard, the ‘anthrax island’

Biodiversity and Conservation, 2008

Formaldehyde runoff was an unintended impact of the anthrax decontamination procedure on the isla... more Formaldehyde runoff was an unintended impact of the anthrax decontamination procedure on the island of Gruinard. The death of intertidal organisms was observed where formaldehyde reached the shore during 1986. The extent to which shores on Gruinard have recovered was assessed with survey work in 2000. Recovery estimates were based on the hypothesis that the process of recolonization is partly dependent on species' dispersal capability. Underdevelopment of the assemblage of species lacking planktonic dispersal stages (direct developers) is therefore evidence that the process of recolonization is ongoing, rather than complete. A novel multivariate test showed that, when comparing quadrats from Gruinard and nearby mainland shores, assemblages of direct developing molluscs were significantly more distinct than assemblages of molluscs with planktonic dispersal stages. The average densities of species with direct development were generally lower on Gruinard than on mainland shores. While some species with direct development have similar densities on Gruinard and on the surrounding shores, the recovery of the overall assemblage was still incomplete after 14 years. In contrast, the harvested species, Littorina littorea, appeared to benefit from the absence of humans visiting Gruinard's shores. Populations of L. littorea on Gruinard contained significantly higher proportions of large individuals. Depending on the dispersal capabilities of different species, Gruinard is either still in recovery or acts as a reserve.

Research paper thumbnail of The effects of dispersal mode on the spatial distribution patterns of intertidal molluscs

Journal of Animal Ecology, 2001

Summary 1. As many species of marine benthic invertebrates have a limited capacity for movement a... more Summary 1. As many species of marine benthic invertebrates have a limited capacity for movement as adults, dispersal mode is often considered as a determinant of geographical ranges, genetic structure and evolutionary history. Species that reproduce without a larval stage can only disperse by floating or rafting. It is proposed that the colonization processes associated with such direct developing species

Research paper thumbnail of Request for specimens of specialist species of salinelagoons in the British Isles

Research paper thumbnail of Uist Lagoons Survey

Scotland has around a hundred saline lagoons, coastal lochs that are not quite as saline as the s... more Scotland has around a hundred saline lagoons, coastal lochs that are not quite as saline as the sea. A small number of organisms are confined to these lochs, but most of these are very small and belong to groups that are difficult to identify. A consortium of specialists in identification at the National Museum of Scotland and ecologists sampled most of the saline lagoons on designated sites (SSSI and SAC) in the Uists, the area believed to have the best biodiversity of lagoon organisms in Scotland. The study not only confirmed the presence of these specialist species, but also that they were more widely distributed in the Uists than had been believed. Samples of the organisms have been placed in the permanent collections of the National Museum of Scotland and (for plants) in the Royal Botanic Gardens Edinburgh, where they will be available for future study.

Research paper thumbnail of Hydrobiidae on North Uist

One of the problems of working on lochs that are slightly saline is a group of tiny (1-4mm) mollu... more One of the problems of working on lochs that are slightly saline is a group of tiny (1-4mm) molluscs called mudsnails (Hydrobiidae). The rarest of these, Hydrobia acuta neglecta, was first identified in the UK in the Uists. This project aimed to eliminate any doubt about the identity. Genetic analyses funded by SNH and conducted by scientists at the National Museum of Scotland and Heriot-Watt University confirmed that there were healthy populations of this snail in three lochs in North Uist.

Research paper thumbnail of Morphological and molecular identification of Hydrobiidae from brackish lagoons in Scotland

The following paper presents the results on the determination of the diversity of species from th... more The following paper presents the results on the determination of the diversity of species from the Phytophthora genus occurring in the declining oak stands in Krotoszyn Plateau in Poland. From the 50s of the last century, significant deterioration of oak health was observed in these stands, and Phytophthora species were suggested as one of the factors of the decline. In order to determine the presence of pathogenic organisms from the Phytophthora genus in these stands, 180 rhizosphere soil samples from three forest districts throughout the Krotoszyn Plateau were collected and subjected to the isolation method. Phytophthora species were consistently isolated from all the sampled stands, and 194 isolates from 111 positive samples were obtained. However, 150 (77%) and 44 (23%) isolates originated from the samples taken under the symptomatic and asymptomatic trees, respectively. All the obtained isolates were morphologically classified using the light and scanning electron microscopy and divided into morphological groups. Genomic DNA was isolated from selected isolates representing each group, ITS regions were amplified and sequence analyses were performed. In total, four different Phytophthora species were detected, including P. cactorum, P. plurivora, 204

Research paper thumbnail of 2016 site condition monitoring of the rocky reefs and sea caves of Mousa SAC and survey of sedimentary habitats of the Mousa to Boddam MPA

Research paper thumbnail of The biodiversity of saline lagoons in the Uists with notes on the morphological and molecular identification of Hydrobiidae

Research paper thumbnail of Hydrobiidae of North Uist

Research paper thumbnail of A long-finned specimen of Beryx decadactylus caught in the North-eastern Atlantic of Rockall

Journal of Fish Biology, 1999

A long-finned specimen of Beryx decadactylus from off Rockall is reported and the Northeastern At... more A long-finned specimen of Beryx decadactylus from off Rockall is reported and the Northeastern Atlantic persistence of juvenile characters in subadult and adult fish is discussed.

Research paper thumbnail of Dispersal mode and assessments of recovery on the shores of Gruinard, the ‘anthrax island’

Biodiversity and Conservation, 2008

Formaldehyde runoff was an unintended impact of the anthrax decontamination procedure on the isla... more Formaldehyde runoff was an unintended impact of the anthrax decontamination procedure on the island of Gruinard. The death of intertidal organisms was observed where formaldehyde reached the shore during 1986. The extent to which shores on Gruinard have recovered was assessed with survey work in 2000. Recovery estimates were based on the hypothesis that the process of recolonization is partly dependent on species' dispersal capability. Underdevelopment of the assemblage of species lacking planktonic dispersal stages (direct developers) is therefore evidence that the process of recolonization is ongoing, rather than complete. A novel multivariate test showed that, when comparing quadrats from Gruinard and nearby mainland shores, assemblages of direct developing molluscs were significantly more distinct than assemblages of molluscs with planktonic dispersal stages. The average densities of species with direct development were generally lower on Gruinard than on mainland shores. While some species with direct development have similar densities on Gruinard and on the surrounding shores, the recovery of the overall assemblage was still incomplete after 14 years. In contrast, the harvested species, Littorina littorea, appeared to benefit from the absence of humans visiting Gruinard's shores. Populations of L. littorea on Gruinard contained significantly higher proportions of large individuals. Depending on the dispersal capabilities of different species, Gruinard is either still in recovery or acts as a reserve.

Research paper thumbnail of Dispersal mode and assessments of recovery on the shores of Gruinard, the ‘anthrax island’

Biodiversity and Conservation, 2008

Formaldehyde runoff was an unintended impact of the anthrax decontamination procedure on the isla... more Formaldehyde runoff was an unintended impact of the anthrax decontamination procedure on the island of Gruinard. The death of intertidal organisms was observed where formaldehyde reached the shore during 1986. The extent to which shores on Gruinard have recovered was assessed with survey work in 2000. Recovery estimates were based on the hypothesis that the process of recolonization is partly dependent on species' dispersal capability. Underdevelopment of the assemblage of species lacking planktonic dispersal stages (direct developers) is therefore evidence that the process of recolonization is ongoing, rather than complete. A novel multivariate test showed that, when comparing quadrats from Gruinard and nearby mainland shores, assemblages of direct developing molluscs were significantly more distinct than assemblages of molluscs with planktonic dispersal stages. The average densities of species with direct development were generally lower on Gruinard than on mainland shores. While some species with direct development have similar densities on Gruinard and on the surrounding shores, the recovery of the overall assemblage was still incomplete after 14 years. In contrast, the harvested species, Littorina littorea, appeared to benefit from the absence of humans visiting Gruinard's shores. Populations of L. littorea on Gruinard contained significantly higher proportions of large individuals. Depending on the dispersal capabilities of different species, Gruinard is either still in recovery or acts as a reserve.