Secondary stress. A secondary stress is any stress in the structure which is not a primary stress or peak stress. Source: API SPEC 16R, Specification for Marine Drilling Riser Couplings, Exploration and Production Department, First Edition, January 1997. Global Standards.
Two groups of ground nesting bees commonly. found in Michigan are bumble bees and. burrower (andrenid) bees. Bumble bees are. easily recognized by their large, robust, hairy, black and yellow (sometimes orange) bodies. Bumble bees live in colonies of several. hundred individuals, but only the queens.
Many plants in the Fabaceae family are an important source of pollen for the bumblebee species Bombus hortorum. This bee species is especially fond of one species in particular; Trifolium pratense, also known as red clover, is a popular food source in the diet of Bombus hortorum.