The turfgrass ecosystem supports a diverse community of nonpest invertebrates that includes which of the following groups?

The turfgrass ecosystem supports a diverse community of nonpest invertebrates that includes which of the following groups?

• A. Nematodes
• B. Arthropods
• C. Annelids
• D. Gastropods

Answer: (B)

In turfgrass ecosystems, the most prominent nonpest invertebrate community is made up of arthropods. Their exoskeleton, segmented bodies, and jointed legs support a vast diversity of forms and lifestyles, from tiny insects and spiders to mites. This broad diversity translates into many ecological roles that keep the turf healthy: detritivores break down organic matter and help recycle nutrients, while predators and parasitoids keep pest populations in check. Some arthropods also contribute to soil structure and microhabitat quality, enhancing overall ecosystem function.

Other invertebrate groups do occur in turf, but they don’t represent the same breadth of diversity and ecological roles as arthropods. Nematodes are microscopic roundworms that include both beneficial and harmful species, but they are not as visibly diverse in the broad, above- and below-ground community. Annelids like earthworms improve soil structure, and gastropods such as slugs and snails can be pests in some situations, but they don’t form the wide-ranging, multi-niche group that arthropods do in turf ecosystems.