Table 4.

Best performing models for Hammond Pond (Newton, MA), Blue Hills (Milton, MA), and Hall's Pond (Brookline, MA), with pre-COVID-19 data as the reference category.

Site	R2	Explanatory variables	Coefficients	SE	t-Value	p value	Significance
Hammond Pond	0.57	Intercept	70.15	0.64	109.44	<0.001	***
		log(road distance)	−10.24	0.12	−37.74	<0.001	***
		COVID-19 with non-leafed trees	−1.49	0.41	−3.63	<0.001	***
		COVID-19 with leafed trees	−2.79	0.38	−7.33	<0.001	***
Blue Hills	0.48	Intercept	72.89	0.84	87.11	<0.001	***
		log(road distance)	−10.73	0.15	−31.88	<0.001	***
		COVID-19 with non-leafed trees	5.38	0.50	10.66	<0.001	***
		COVID-19 with leafed trees	4.06	0.42	9.61	<0.001	***
Hall's Pond	0.15	Intercept	49.40	0.32	152.90	<0.001	***
		COVID-19 with non-leafed trees	−3.05	0.55	−5.57	<0.001	***
		COVID-19 with leafed trees	−1.54	0.55	−2.81	0.006	**