Influence of groundwater on distribution of dwarf wedgemussels
(<i>Alasmidonta heterodon</i>) in the
upper reaches of the Delaware River, northeastern USA

Rosenberry, Donald O.; Briggs, Martin A.; Voytek, Emily B.; Lane, John W.

doi:10.5194/hess-20-4323-2016

Articles | Volume 20, issue 10

https://doi.org/10.5194/hess-20-4323-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

https://doi.org/10.5194/hess-20-4323-2016

© Author(s) 2016. This work is distributed under
the Creative Commons Attribution 3.0 License.

Articles | Volume 20, issue 10

Research article

| Highlight paper

|

25 Oct 2016

Research article | Highlight paper |

| 25 Oct 2016

Influence of groundwater on distribution of dwarf wedgemussels (Alasmidonta heterodon) in the upper reaches of the Delaware River, northeastern USA

Donald O. Rosenberry, Martin A. Briggs, Emily B. Voytek, and John W. Lane

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May 2016	39	14	0	53
Jun 2016	23	7	1	31
Jul 2016	8	2	0	10
Aug 2016	8	3	0	11
Sep 2016	3	0	3
Oct 2016	89	17	11	117
Nov 2016	126	12	8	146
Dec 2016	38	11	0	49
Jan 2017	47	20	0	67
Feb 2017	24	12	1	37
Mar 2017	78	12	8	98
Apr 2017	81	15	7	103
May 2017	72	17	7	96
Jun 2017	77	14	5	96
Jul 2017	29	12	1	42
Aug 2017	16	7	0	23
Sep 2017	22	7	0	29
Oct 2017	13	14	1	28
Nov 2017	9	20	14	43
Dec 2017	14	26	1	41
Jan 2018	12	13	1	26
Feb 2018	24	9	1	34
Mar 2018	16	20	0	36
Apr 2018	11	13	0	24
May 2018	10	15	1	26
Jun 2018	7	12	0	19
Jul 2018	11	7	1	19
Aug 2018	15	17	0	32
Sep 2018	12	15	2	29
Oct 2018	14	15	3	32
Nov 2018	15	21	1	37
Dec 2018	10	13	1	24
Jan 2019	6	5	1	12
Feb 2019	13	15	0	28
Mar 2019	22	7	0	29
Apr 2019	24	10	0	34
May 2019	29	9	3	41
Jun 2019	30	12	0	42
Jul 2019	39	20	0	59
Aug 2019	34	12	0	46
Sep 2019	27	10	1	38
Oct 2019	38	14	1	53
Nov 2019	37	15	0	52
Dec 2019	32	10	1	43
Jan 2020	38	8	0	46
Feb 2020	37	5	0	42
Mar 2020	49	12	2	63
Apr 2020	56	8	0	64
May 2020	65	7	1	73
Jun 2020	56	9	0	65
Jul 2020	54	15	6	75
Aug 2020	60	13	4	77
Sep 2020	70	9	0	79
Oct 2020	47	9	1	57
Nov 2020	27	15	0	42
Dec 2020	60	7	0	67
Jan 2021	79	9	0	88
Feb 2021	63	8	1	72
Mar 2021	47	5	0	52
Apr 2021	48	9	0	57
May 2021	55	6	0	61
Jun 2021	53	13	0	66
Jul 2021	53	6	0	59
Aug 2021	37	13	1	51
Sep 2021	41	9	0	50
Oct 2021	31	47	0	78
Nov 2021	41	24	1	66
Dec 2021	43	8	1	52
Jan 2022	44	17	1	62
Feb 2022	33	12	1	46
Mar 2022	40	14	0	54
Apr 2022	36	8	1	45
May 2022	39	11	1	51
Jun 2022	33	2	0	35
Jul 2022	37	7	3	47
Aug 2022	46	8	0	54
Sep 2022	37	8	1	46
Oct 2022	41	11	2	54
Nov 2022	40	13	2	55
Dec 2022	46	6	3	55
Jan 2023	51	20	2	73
Feb 2023	47	9	3	59
Mar 2023	52	12	2	66
Apr 2023	37	7	2	46
May 2023	53	9	0	62
Jun 2023	66	4	2	72
Jul 2023	50	6	5	61
Aug 2023	44	10	1	55
Sep 2023	41	4	1	46
Oct 2023	54	11	4	69
Nov 2023	21	0	21
Dec 2023	18	9	3	30
Jan 2024	11	23	0	34
Feb 2024	12	5	0	17
Mar 2024	19	14	3	36
Apr 2024	22	8	4	34
May 2024	13	9	7	29
Jun 2024	41	9	2	52
Jul 2024	15	4	4	23
Aug 2024	26	1	1	28
Sep 2024	6	4	0	10
Oct 2024	13	5	0	18
Nov 2024	6	7	1	14
Dec 2024	18	16	1	35
Jan 2025	15	7	4	26
Feb 2025	29	9	3	41
Mar 2025	15	10	0	25
Apr 2025	11	13	2	26
May 2025	22	7	4	33
Jun 2025	58	22	0	80
Jul 2025	34	8	4	46
Aug 2025	37	19	1	57
Sep 2025	58	18	1	77
Oct 2025	15	34	2	51
Nov 2025	9	8	0	17

Cumulative views and downloads (calculated since 18 May 2016)

Month	HTML	PDF	XML	Total
May 2016	39	14	0	53
Jun 2016	23	7	1	31
Jul 2016	8	2	0	10
Aug 2016	8	3	0	11
Sep 2016	3	0	3
Oct 2016	89	17	11	117
Nov 2016	126	12	8	146
Dec 2016	38	11	0	49
Jan 2017	47	20	0	67
Feb 2017	24	12	1	37
Mar 2017	78	12	8	98
Apr 2017	81	15	7	103
May 2017	72	17	7	96
Jun 2017	77	14	5	96
Jul 2017	29	12	1	42
Aug 2017	16	7	0	23
Sep 2017	22	7	0	29
Oct 2017	13	14	1	28
Nov 2017	9	20	14	43
Dec 2017	14	26	1	41
Jan 2018	12	13	1	26
Feb 2018	24	9	1	34
Mar 2018	16	20	0	36
Apr 2018	11	13	0	24
May 2018	10	15	1	26
Jun 2018	7	12	0	19
Jul 2018	11	7	1	19
Aug 2018	15	17	0	32
Sep 2018	12	15	2	29
Oct 2018	14	15	3	32
Nov 2018	15	21	1	37
Dec 2018	10	13	1	24
Jan 2019	6	5	1	12
Feb 2019	13	15	0	28
Mar 2019	22	7	0	29
Apr 2019	24	10	0	34
May 2019	29	9	3	41
Jun 2019	30	12	0	42
Jul 2019	39	20	0	59
Aug 2019	34	12	0	46
Sep 2019	27	10	1	38
Oct 2019	38	14	1	53
Nov 2019	37	15	0	52
Dec 2019	32	10	1	43
Jan 2020	38	8	0	46
Feb 2020	37	5	0	42
Mar 2020	49	12	2	63
Apr 2020	56	8	0	64
May 2020	65	7	1	73
Jun 2020	56	9	0	65
Jul 2020	54	15	6	75
Aug 2020	60	13	4	77
Sep 2020	70	9	0	79
Oct 2020	47	9	1	57
Nov 2020	27	15	0	42
Dec 2020	60	7	0	67
Jan 2021	79	9	0	88
Feb 2021	63	8	1	72
Mar 2021	47	5	0	52
Apr 2021	48	9	0	57
May 2021	55	6	0	61
Jun 2021	53	13	0	66
Jul 2021	53	6	0	59
Aug 2021	37	13	1	51
Sep 2021	41	9	0	50
Oct 2021	31	47	0	78
Nov 2021	41	24	1	66
Dec 2021	43	8	1	52
Jan 2022	44	17	1	62
Feb 2022	33	12	1	46
Mar 2022	40	14	0	54
Apr 2022	36	8	1	45
May 2022	39	11	1	51
Jun 2022	33	2	0	35
Jul 2022	37	7	3	47
Aug 2022	46	8	0	54
Sep 2022	37	8	1	46
Oct 2022	41	11	2	54
Nov 2022	40	13	2	55
Dec 2022	46	6	3	55
Jan 2023	51	20	2	73
Feb 2023	47	9	3	59
Mar 2023	52	12	2	66
Apr 2023	37	7	2	46
May 2023	53	9	0	62
Jun 2023	66	4	2	72
Jul 2023	50	6	5	61
Aug 2023	44	10	1	55
Sep 2023	41	4	1	46
Oct 2023	54	11	4	69
Nov 2023	21	0	21
Dec 2023	18	9	3	30
Jan 2024	11	23	0	34
Feb 2024	12	5	0	17
Mar 2024	19	14	3	36
Apr 2024	22	8	4	34
May 2024	13	9	7	29
Jun 2024	41	9	2	52
Jul 2024	15	4	4	23
Aug 2024	26	1	1	28
Sep 2024	6	4	0	10
Oct 2024	13	5	0	18
Nov 2024	6	7	1	14
Dec 2024	18	16	1	35
Jan 2025	15	7	4	26
Feb 2025	29	9	3	41
Mar 2025	15	10	0	25
Apr 2025	11	13	2	26
May 2025	22	7	4	33
Jun 2025	58	22	0	80
Jul 2025	34	8	4	46
Aug 2025	37	19	1	57
Sep 2025	58	18	1	77
Oct 2025	15	34	2	51
Nov 2025	9	8	0	17

Latest update: 17 Nov 2025

Short summary

The remaining populations of the endangered dwarf wedgemussel (DWM) (Alasmidonta heterodon) in the upper Delaware River, northeastern USA, were thought to be located in areas of substantial groundwater discharge to the river. Physical, thermal, and geophysical methods applied at several spatial scales indicate that DWM are located within or directly downstream of areas of substantial groundwater discharge to the river. DWM may depend on groundwater discharge for their survival.