caa a22 4500 445893273 CHVBK 20180317145623.0 cr unu---uuuuu 170323e20111001xx s 000 0 eng 10.1007/s10750-011-0811-4 doi (NATIONALLICENCE)springer-10.1007/s10750-011-0811-4 Stoichiometric relationship between suspension-feeding caddisfly (Trichoptera: Brachycentridae) and seston [Elektronische Daten] [Jason Veldboom, Roger Haro] Organisms must acquire adequate amounts of carbon (C) and nutrients [i.e., nitrogen (N) and phosphorus (P)] from their food to support growth. The growth of organisms can be constrained by consumer-resource elemental imbalances in C:nutrient ratios, especially in aquatic ecosystems. Furthermore, the elemental composition of aquatic organisms can change through ontogeny, which can impose additional challenges to growth (the growth rate hypothesis), terminal body size, and reproductive output. In streams, growth in larval aquatic insects is influenced primarily by food quality and quantity, temperature, and population density. We conducted a field study that tracked the growth of a common suspension-feeding caddisfly (Brachycentrus occidentalis) through its ontogeny by comparing the elemental composition (C:N:P) of the organism with its available food supply (suspended particulate organic matter or seston). Larvae and seston were sampled from four streams throughout 1 year. Differences in the growth of larvae among the streams were evident, even though the streams possessed similar thermal regimes. Spatial and temporal differences in the nutrient contents of B. occidentalis and seston were observed, suggesting a consumer-resource elemental imbalance. Lower C:P and N:P ratios in food were positively correlated to larval growth rate, suggesting growth was limited by P. The C, N, and P contents in B. occidentalis' body tissue did change throughout ontogeny. C:nutrient ratios varied across sites during larval development; however, inter-site variation decreased substantially as the populations approached pupation. Ultimately, consumer-resource elemental imbalances during the larval stage did not lead to differences in pre-emergent standing stocks across sites. Springer Science+Business Media B.V., 2011 Ecological stoichiometry nationallicence Elemental imbalance nationallicence Larval growth nationallicence Seston nationallicence Trichoptera nationallicence Veldboom Jason River Studies Center, University of Wisconsin-La Crosse, 1725 State St., 54601, La Crosse, WI, USA aut Haro Roger River Studies Center, University of Wisconsin-La Crosse, 1725 State St., 54601, La Crosse, WI, USA aut Hydrobiologia Springer Netherlands 675/1(2011-10-01), 129-141 0018-8158 675:1<129 2011 675 10750 https://doi.org/10.1007/s10750-011-0811-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10750-011-0811-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Veldboom Jason River Studies Center, University of Wisconsin-La Crosse, 1725 State St., 54601, La Crosse, WI, USA aut NATIONALLICENCE 700 1- Haro Roger River Studies Center, University of Wisconsin-La Crosse, 1725 State St., 54601, La Crosse, WI, USA aut NATIONALLICENCE 773 0- Hydrobiologia Springer Netherlands 675/1(2011-10-01), 129-141 0018-8158 675:1<129 2011 675 10750 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer