A framework to assess evolutionary responses to anthropogenic light and sound

A framework to assess evolutionary responses to anthropogenic light and sound

John P. Swaddle*, Clinton D. Francis*, Jesse R. Barber, Caren B. Cooper, Christopher C.M. Kyba, Davide M. Dominoni, Graeme Shannon, Erik Aschehoug, Sarah E. Goodwin, Akito Y. Kawahara, David Luther, Kamiel Spoelstra, Margaret Voss, Travis Longcore

Highlights

  • Anthropogenic light and sound are an important component of global change.
  • These stimuli often co-occur and may function synergistically.
  • The selection pressure of light and noise may drive the rate of evolutionary change.
  • We propose a framework to explore the ultimate consequences of noise and light exposure.

DOI: http://dx.doi.org/10.1016/j.tree.2015.06.009

Trends in Ecology and Evolution

Human activities have caused a near-ubiquitous and evolutionarily-unprecedented increase in environmental sound levels and artificial night lighting. These stimuli reorganize communities by interfering with species-specific perception of time-cues, habitat features, and auditory and visual signals. Rapid evolutionary changes could occur in response to light and noise, given their magnitude, geographical extent, and degree to which they represent unprecedented environmental conditions. We present a framework for investigating anthropogenic light and noise as agents of selection, and as drivers of other evolutionary processes, to influence a range of behavioral and physiological traits such as phenological characters and sensory and signaling systems. In this context, opportunities abound for understanding contemporary and rapid evolution in response to human-caused environmental change.

Tuning LEDs to Minimize Insect Attraction

Tuning LEDs to Minimize Insect Attraction

, , , , , , , , Philosophical Transactions B 370(1667)  

Artificial lighting allows humans to be active at night, but has many unintended consequences, including interference with ecological processes, disruption of circadian rhythms and increased exposure to insect vectors of diseases. Although ultraviolet and blue light are usually most attractive to arthropods, degree of attraction varies among orders. With a focus on future indoor lighting applications, we manipulated the spectrum of white lamps to investigate the influence of spectral composition on number of arthropods attracted. We compared numbers of arthropods captured at three customizable light-emitting diode (LED) lamps (3510, 2704 and 2728 K), two commercial LED lamps (2700 K), two commercial compact fluorescent lamps (CFLs; 2700 K) and a control. We configured the three custom LEDs to minimize invertebrate attraction based on published attraction curves for honeybees and moths. Lamps were placed with pan traps at an urban and two rural study sites in Los Angeles, California. For all invertebrate orders combined, our custom LED configurations were less attractive than the commercial LED lamps or CFLs of similar colour temperatures. Thus, adjusting spectral composition of white light to minimize attracting nocturnal arthropods is feasible; not all lights with the same colour temperature are equally attractive to arthropods.