TY - JOUR
T1 - Comparative feeding rates of native and invasive ascidians
AU - Hoxha, Tedi
AU - Crookes, Steve
AU - Lejeusne, Christoph
AU - Dick, Jaimie T.A.
AU - Chang, Xuexiu
AU - Bouchemousse, Sarah
AU - Cuthbert, Ross N.
AU - MacIsaac, Hugh J.
PY - 2018/10
Y1 - 2018/10
N2 - Ascidians have a recent history of species introductions globally, often with strong ecological impacts. Comparisons of per capita effects of invaders and comparable natives are useful to assess such impacts. Here, we explore ingestion rates (IR) and clearance rates (CR) of Ciona intestinalis and Ciona robusta, co-occurring native and non-native ascidians, respectively, from Brittany, France. IR was positively related to food concentration, with the invader responding more strongly to increasing food concentration. CR also differed by species, with the invader demonstrating higher values. C. robusta exhibited a higher functional response (Type I) than did C. intestinalis (Type II). Relative impact measured using seasonal abundance and IR revealed that C. robusta has a much greater impact than C. intestinalis at all food concentrations tested, though the former has a constrained distribution which limits its regional impact. Nevertheless, when abundant, we expect C. robusta to exert a greater impact on algal foods.
AB - Ascidians have a recent history of species introductions globally, often with strong ecological impacts. Comparisons of per capita effects of invaders and comparable natives are useful to assess such impacts. Here, we explore ingestion rates (IR) and clearance rates (CR) of Ciona intestinalis and Ciona robusta, co-occurring native and non-native ascidians, respectively, from Brittany, France. IR was positively related to food concentration, with the invader responding more strongly to increasing food concentration. CR also differed by species, with the invader demonstrating higher values. C. robusta exhibited a higher functional response (Type I) than did C. intestinalis (Type II). Relative impact measured using seasonal abundance and IR revealed that C. robusta has a much greater impact than C. intestinalis at all food concentrations tested, though the former has a constrained distribution which limits its regional impact. Nevertheless, when abundant, we expect C. robusta to exert a greater impact on algal foods.
U2 - 10.1016/j.marpolbul.2018.08.039
DO - 10.1016/j.marpolbul.2018.08.039
M3 - Article
SN - 0025-326X
VL - 135
SP - 1067
EP - 1071
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
ER -