Cover Image

COVER PHOTO: Nudibranch Flabellina affinis slides on the green fronds of Caulerpa cylindracea , an invasive alga that has detrimental effects on Mediterranean native benthic flora and fauna. However, as reported by Santamaría et al. in this issue (Article e03440; doi: 10.1002/ecy.3440 ), the synergistic effect between competition and herbivory can strongly limit the abundance of the invader in well preserved areas, where habitat complexity and herbivory pressure are high. Thus, the interaction between different processes is to be considered when assessing the biotic resistance of native habitats against invaders. Photo credit: Enric Ballesteros.