TY - JOUR
T1 - The Dominance Hierarchy of Wood-Eating Termites from China
AU - Evans, Theodore A.
AU - Kasseney, Boris Dodji
PY - 2019/7
Y1 - 2019/7
N2 - Competition is a fundamental process in ecology and helps to determine dominance hierarchies. Competition and dominance hierarchies have been little investigated in wood-eating termites, despite the necessary traits of similar resources, and showing spatial and temporal overlap. Competition and dominance between five species of wood-eating termites found in Huangzhou, China, was investigated in three laboratory experiments of aggression and detection, plus a year-long field survey of termite foraging activity. Dominance depended on body size, with largest species winning overwhelmingly in paired contests with equal numbers of individuals, although the advantage was reduced in paired competitions with equal biomass. The termites could detect different species from used filter papers, as larger species searched through paper used by smaller species, and smaller species avoided papers used by larger species. The largest species maintained activity all year, but in low abundance, whereas the second largest species increased activity in summer, and the smallest species increased their activity in winter. The termite species displayed a dominance hierarchy based on fighting ability, with a temporal change in foraging to avoid larger, more dominant species. The low abundance of the largest species, here Macrotermes barneyi, may be a function of human disturbance, which allows subordinate species to increase. Thus, competitive release may explain the increase in abundance of pest species, such as Coptotermes formosanus, in highly modified areas, such as urban systems.
AB - Competition is a fundamental process in ecology and helps to determine dominance hierarchies. Competition and dominance hierarchies have been little investigated in wood-eating termites, despite the necessary traits of similar resources, and showing spatial and temporal overlap. Competition and dominance between five species of wood-eating termites found in Huangzhou, China, was investigated in three laboratory experiments of aggression and detection, plus a year-long field survey of termite foraging activity. Dominance depended on body size, with largest species winning overwhelmingly in paired contests with equal numbers of individuals, although the advantage was reduced in paired competitions with equal biomass. The termites could detect different species from used filter papers, as larger species searched through paper used by smaller species, and smaller species avoided papers used by larger species. The largest species maintained activity all year, but in low abundance, whereas the second largest species increased activity in summer, and the smallest species increased their activity in winter. The termite species displayed a dominance hierarchy based on fighting ability, with a temporal change in foraging to avoid larger, more dominant species. The low abundance of the largest species, here Macrotermes barneyi, may be a function of human disturbance, which allows subordinate species to increase. Thus, competitive release may explain the increase in abundance of pest species, such as Coptotermes formosanus, in highly modified areas, such as urban systems.
KW - Macrotermes
KW - Odontotermes
KW - Coptotermes
KW - Reticulitermes
KW - aggression tests
KW - competitive release
KW - urban ecosystems
KW - INTERSPECIFIC AGONISTIC BEHAVIOR
KW - FORMOSAN SUBTERRANEAN TERMITE
KW - ESTIMATING POPULATION-SIZE
KW - ANTHROPOGENIC DISTURBANCE
KW - COPTOTERMES-FORMOSANUS
KW - HYMENOPTERA-FORMICIDAE
KW - HUMID FOREST
KW - ISOPTERA
KW - COMPETITION
KW - ANT
U2 - 10.3390/insects10070210
DO - 10.3390/insects10070210
M3 - Article
C2 - 31323742
SN - 2075-4450
VL - 10
JO - Insects
JF - Insects
IS - 7
M1 - 210
ER -